Carbonite Server Backup
Windows Agent (64-bit)
Version 9.21.1018
Release Notes, November 1, 2022
1 Overview
1.1  Release History
1.2  Compatibility
1.3  Supported Platforms
1.3.1  Image Plug-in Supported Platforms
1.3.2  Exchange Plug-in Supported Platforms
1.3.3  Oracle Plug-in Supported Platforms
1.3.4  SQL Server Plug-in Supported Platforms
2 NEW FEATURES
3 INSTALLATION NOTES
3.1  Agent Installation Notes
3.1.1  Installation Requirements
3.1.2  Conditional Requirements
3.1.3  Licensing
3.1.4  Installation/Upgrade
3.2  Plug-in Installation Notes
3.2.1  Image Plug-in Installation/Upgrade Notes
3.2.2  Exchange Plug-in Installation Notes
3.2.3  Oracle Plug-in Installation Notes
3.2.4  SQL Server Plug-in Installation Notes
3.2.5  Cluster Support Plug-in Installation Notes
4 FIXES, KNOWN ISSUES AND LIMITATIONS
4.1  Fixes
4.1.1  Fixes in Version 9.21
4.1.2  Fixes in Version 9.20
4.2  Known Issues
4.2.1  Agent Configuration, Backup and LogViewer Issues
4.2.2   Agent Restore Issues
4.2.3  Plug-in Configuration and Backup Issues
4.2.4  Plug-in Restore Issues
4.2.5  Install/Uninstall/Upgrade Issues
4.3  Limitations
5 PRODUCT SUPPORT
5.1  Technical Support
5.2  Product Updates
5.3  Documentation

© Carbonite Inc. 2022. All Rights Reserved.
The release notes are governed by the Terms of Service found at https://www.carbonite.com/terms-of-use/carbonite-general-enterprise-terms-of-service. Carbonite, at its sole discretion, reserves the right to modify or revoke these Release Notes at any time, without notice.
1 Overview
The Windows Agent is installed on each 64-bit Microsoft Windows system that you want to protect. Using Portal, you can manage the agent, back up data to a vault, and restore data from the vault.
Important: Beginning in version 9.20, only a 64-bit version of the Windows Agent is available. Starting on June 1, 2022, Carbonite only offers best effort support for 32-bit Windows Agent versions. On June 1, 2023, the 32-bit Windows Agent will reach its end of life.
You can also install plug-ins that protect applications and provide additional functionality. The following plug-ins are available with the 64-bit Windows Agent:
•	Image Plug-in
•	Exchange Plug-in
•	Oracle Plug-in  
•	SQL Server Plug-in
•	Cluster Support Plug-in
1.1  Release History
Version 9.21.1018, October 17, 2022
Version 9.20.1009, October 3, 2022
1.2  Compatibility
Portal	To manage this Windows Agent version, we recommend using Portal version 9.10 or later. While the Agent is compatible with earlier Portal versions, the latest Portal versions include important security enhancements and new features.
Important: This Agent version checks the public key of the Portal AMP Proxy certificate when it tries to connect to Portal. If users are hosting their own Portal, we recommend updating the Portal AMP Proxy certificate before new agents are registered to Portal or existing agents are upgraded from version 8.70 or earlier. For more information, see the Portal Installation and Configuration Guide. 	
Windows CentralControl	We do not recommend managing agents using Windows CentralControl. To take advantage of new features and important security enhancements, we highly encourage using Portal to manage the Windows Agent. 
By default, the Windows Agent cannot connect to Windows CentralControl. If you must manage the Windows Agent using Windows CentralControl 9.21, please contact Support for assistance. 
Note: New features such as ransomware detection are not available in Windows CentralControl.
Note: Changing job configurations using Portal and Windows CentralControl alternately is not supported. Do not manage the same agent using both Portal and Windows CentralControl. 	
Director	This Windows Agent version is supported with Director version 8.62 and 8.56. We strongly recommend the latest Director version so you can take advantage of the latest fixes and new features.	
Bare Metal Restore	The Windows Agent supports Bare Metal Restore (BMR) backup jobs. BMR backups created using this version of the Windows Agent can only be restored using System Restore version 9.20 or later.
Note: Encrypted volumes (BitLocker, TrueCrypt, etc.) are not supported in BMR jobs.	
Granular Restore for Microsoft Exchange and SQL	You can use Granular Restore for Microsoft Exchange and SQL version 9.20 or later to restore items from safesets created using the Windows Agent and Plug-ins version 9.21.	
Granular Restore for Microsoft SharePoint	You can use Granular Restore for Microsoft SharePoint version 8.70 or later to restore SharePoint data from safesets created using the Windows Agent and SQL Server Plug-in version 9.21.	
1.3  Supported Platforms
The Agent is supported on the 64-bit Microsoft platforms shown in the following table, with Intel x64 or AMD64 processors:
Supported Operating System	Editions	Service Pack/Version	
Windows Server 2022	Essentials, Standard, Datacenter, Server Core		
Windows 11 1	Home, Pro, Enterprise	Version 22H2 	
Windows Server 2019	Essentials, Standard, Datacenter, Server Core	 	
Windows Server 2016	Essentials, Standard, Datacenter, Server Core	 	
Windows 10	Home, Pro, Enterprise	Version 22H2	
Windows Server 2012 R2	Foundation, Essentials, Standard, Datacenter, Server Core	 	
Windows 8.1	Enterprise	 	
Windows Server 2012	Foundation, Essentials, Standard, Datacenter, Server Core	 	
Windows Storage Server 2012	Standard, Workgroup	 	
 1 UEFI firmware is required for Windows 11.	
1.3.1  Image Plug-in Supported Platforms
The Image Plug-in is supported on the 64-bit Microsoft platforms shown in the following table, with Intel x64 or AMD64 processors:
Supported Operating System	Service Pack/Version	
Windows Server 2022	 	
Windows 11	Version 22H2	
Windows Server 2019	 	
Windows Server 2016	 	
Windows 10	Version 22H2	
Windows Server 2012 R2	 	
Windows 8.1	 	
Windows Server 2012	 	
Note:   The Image Plug-in is supported with both UEFI and BIOS firmware.
Note:   The Image Plug-in is only supported with NTFS file systems. The Image Plug-in is not supported with other file systems (e.g., ReFS, FAT, FAT32, exFAT) except for volumes that are automatically created by Windows and are required to start the system. To back up a system with a file system other than NTFS, use a Windows Agent Local System job.
Note:   In a cluster, only GPT disks are supported for Image backups (including application-consistent Image backups of volumes with database files).
Note:   Encrypted volumes (BitLocker, TrueCrypt, etc.) are not supported in Image Plug-in jobs.
1.3.2  Exchange Plug-in Supported Platforms
The Exchange Plug-in is supported on the 64-bit Microsoft platforms shown in the following table.
For Exchange versions supported for granular restore, see the Granular Restore for Microsoft Exchange and SQL release notes.
Note:   In previous Agent versions, this plug-in was called the Exchange 2010/2013/2016 DR Plug-in. 
Exchange Server 2019 (CU12 May22SU) is supported on:	
Windows Server 2022	Standard, Datacenter	 	
Windows Server 2019	Standard, Datacenter	 	
Exchange Server 2016 (CU23 May22SU) is supported on:	
Windows Server 2016	Standard, Datacenter	 	
Windows Server 2012 R2	Standard, Datacenter	 	
Windows Server 2012	Standard, Datacenter	 	
Exchange Server 2013 (CU23 May22SU) is supported on:	
Windows Server 2012 R2	Standard, Datacenter	 	
Windows Server 2012	Standard, Datacenter	 	
Note:   Granular Restore is only supported with DR safesets created with an Exchange Plug-in version 7.10 or later, backed up to Director version 8.00 or later. Portal or Windows CentralControl is required to share DR safesets.
1.3.3  Oracle Plug-in Supported Platforms
The Oracle Plug-in is supported on the 64-bit Microsoft platforms shown in the following table:
Oracle 19c is supported on:	
Windows Server 2019	Standard, Datacenter	 	
Windows Server 2016	Standard, Datacenter	 	
Oracle 18c is supported on:	
Windows Server 2016	Standard, Datacenter	 	
Oracle 12c is supported on:	
Windows Server 2016	Standard, Datacenter	 	
Windows Server 2012 R2	Standard, Datacenter	 	
Windows Server 2012	Standard, Datacenter	 	
Oracle 11g R2 64-bit is supported on:	
Windows Server 2012 R2	Standard, Datacenter	 	
Windows Server 2012	Standard, Datacenter	 	
Note:   Only non-CDB Oracle databases are supported.
1.3.4  SQL Server Plug-in Supported Platforms
The SQL Server Plug-in is supported on the 64-bit Microsoft platforms shown in the following table. SQL Server clusters are supported with the SQL Server and Cluster Support Plug-ins.
For SQL Server versions supported for granular restore, see the Granular Restore for Microsoft Exchange and SQL release notes.
SQL Server and SQL Server Express 2019 (CU16 June 2022) 64-bit are supported on:	
Windows Server 2022	Standard, Datacenter	 	
Windows Server 2019	Standard, Datacenter	 	
Windows Server 2016	Standard, Datacenter	 	
SQL Server and SQL Server Express 2017 (CU30 July 2022) 64-bit are supported on:	
Windows Server 2019	Standard, Datacenter	 	
Windows Server 2016	Standard, Datacenter	 	
Windows Server 2012 R2	Foundation, Essentials, Standard, Datacenter	 	
Windows Server 2012 	Foundation, Essentials, Standard, Datacenter	 	
SQL Server and SQL Server Express 2016 (SP3) 64-bit are supported on:	
Windows Server 2016	Essentials, Standard, Datacenter	 	
Windows Server 2012 R2	Foundation, Essentials, Standard, Datacenter	 	
Windows Server 2012 	Foundation, Essentials, Standard, Datacenter	 	
SQL Server and SQL Server Express 2014 (SP3 CU4) 64-bit are supported on:	
Windows Server 2016	Essentials, Standard, Datacenter	 	
Windows Server 2012 R2	Foundation, Essentials, Standard, Datacenter	 	
Windows Server 2012 	Foundation, Essentials, Standard, Datacenter	 	
SQL Server and SQL Server Express 2012 (SP4) 64-bit are supported on:	
Windows Server 2012 R2	Foundation, Essentials, Standard, Datacenter	 	
Windows Server 2012 	Foundation, Essentials, Standard, Datacenter	 	
Notes:
•	If you back up a SQL Server database and restore it to a different machine running Windows Server 2016 or later, you will not be able to access the restored database using Windows authentication. Instead, do one of the following:
•	Log in to the SQL Server instance using SQL Server authentication. If some databases used accounts with Windows authentication, change the security settings and change ownership to different accounts or recreate the accounts.
•	Start SQL Server in single-user mode and log in to the instance as a member of the computer’s local Administrators group.
•	Use the System Restore application to restore the original machine.
•	SharePoint granular restore is supported with safesets created with the SQL Server Plug-in. Portal or Windows CentralControl is required to share SQL safesets.
•	Host-named site collections in SharePoint are not supported for granular restore. 
2 NEW FEATURES
Security enhancements
Security enhancements have been added in this Windows Agent version.
3 INSTALLATION NOTES
3.1  Agent Installation Notes
3.1.1  Installation Requirements
•	CPU and RAM to meet the basic requirements of your operating system, as prescribed by Microsoft 
•	A TCP/IP stack 
•	At least 200 MB of free disk space for a new installation. An upgrade may require more. Additional free space is required for agent files created for backup jobs. 
3.1.2  Conditional Requirements
If you use an antivirus program, disable real-time scanning on reads (called "outgoing" in some antivirus products). 
Note:   Do not include antivirus product installation directories or resource folders in backup jobs.
3.1.3  Licensing
Agent and Plug-in licenses are distributed automatically when the agent connects to a vault (based on your license quota). To back up and restore data to or from a vault, you need a valid account, username and password. Contact your service provider to obtain the required information.
3.1.4  Installation/Upgrade
The file name of the Windows Agent installation kit is: Agent-Windows-x64-9-21-1018.exe
The 64-bit Agent kit installs: 
buagent.exe – Version 9.21.1018
VV.exe – Version 9.21.1018
VVAgent.exe – Version 9.21.1018
XLogTranslator.exe – Version 9.21.1018
LogViewer.exe – Version 9.21.1018
BMRCaptureEnvInfo.dll – Version 9.21.1018
evVss.dll – Version 9.21.1018
Exchange2010Plugin.dll – Version 9.21.1018
ExchangeVSSPlugin.dll – Version 9.21.1018
OraPlugin.dll – Version 9.21.1018
SQL2012Plugin.dll – Version 9.21.1018
SystemStatePlugin.dll – Version 9.21.1018
SystemVolumePlugin.dll – Version 9.21.1018
VolumeImagePlugin.dll – Version 9.21.1018
VVClMsg.dll – Version 9.21.1018
VVExch.dll – Version 9.21.1018
Note: The Agent installation places the VVClMsg.dll file in the Agent installation path. This file contains the error codes and resource strings that the event viewer uses to display Agent messages.
Note: Do not install the Agent in a Windows-encrypted directory.
You can upgrade the following Windows Agent versions to version 9.21:
•	Version 9.20
•	Version 9.10
•	Version 9.00
•	Version 8.x
•	Version 7.x
Note: A system reboot is required if you upgrade an Agent with the Image Plug-in from version 9.10 or earlier to version 9.21.
Support has ended for legacy Exchange MAPI, SQL Server VDI, and SharePoint Plug-in jobs. You must delete any jobs with these legacy types before you can upgrade an agent. If you upgrade an agent where a legacy plug-in is installed, the plug-in will be removed.
3.2  Plug-in Installation Notes
3.2.1  Image Plug-in Installation/Upgrade Notes
A system reboot is required after you:
•	Install the Image Plug-in with an Agent.
•	Upgrade an Agent with the Image Plug-in from version 9.10 or earlier to version 9.21.
•	Modify an Agent installation to add or remove the Image Plug-in.
•	Uninstall an Agent where the Image Plug-in is installed.
3.2.2  Exchange Plug-in Installation Notes
An Agent with the Exchange Plug-in only needs to be installed on one member of a Data Availability Group (DAG). The Agent will have access to the database copies on that particular DAG member.
3.2.3  Oracle Plug-in Installation Notes
The Oracle Plug-in can be installed during a clean install or on an existing agent. To install on an existing agent, select "Modify" from the installation options.
3.2.4  SQL Server Plug-in Installation Notes
This version of the Plug-in supports Transparent Data Encryption (TDE) in SQL Server 2019, 2017, SQL Server 2016, SQL Server 2014 and SQL Server 2012.
3.2.5  Cluster Support Plug-in Installation Notes
To install the SQL Server, Exchange, and Cluster Support Plug-ins:
1.	Use the Agent installation kit to install the Agent, SQL Server or Exchange Plug-in, and Cluster Plug-in on the physical nodes.
2.	Register the virtual node to Portal, or connect to the virtual IP using Windows CentralControl to manage the virtual node.
3.	Register the physical nodes to the vault before using the virtual agent.
4.	Use the new registered virtual agent as a normal agent to register to the same vault and create backup jobs. 
4 FIXES, KNOWN ISSUES AND LIMITATIONS
4.1  Fixes
4.1.1  Fixes in Version 9.21
•	On some systems with UEFI firmware, the log for a BMR backup with Windows Agent 9.20 contained a "Bare metal backup does not contain System volume" error message even though the system volume was backed up. This incorrect error message no longer appears. (EV-88724)
•	On some systems, the log for an Image backup with Windows Agent 9.20 contained a "Re-enabling CBT Driver" error message even though the backup was successful. This message has been changed from an error message to an information message. (EV-88769)
•	In rare cases when you tried to install or upgrade the Windows Agent, a message stated that a pending reboot was required, even if you had already rebooted the system. This issue has been resolved. (EV-88401)
4.1.2  Fixes in Version 9.20
•	When the Image Plug-in is installed with the Windows Agent, system errors no longer occur when drives go online or offline during backups. This problem sometimes occurred with Windows Agent 9.10 and the Image Plug-in. (EV-82181, EV-83754)
•	When the agent has trouble communicating with Portal because Portal is under a high load, Local System jobs with the Bare Metal Restore option selected no longer disappear from Portal. (EV-82113, EV-81653)
•	When you re-register an agent to a vault as a computer that was moved or copied from another vault, information is updated correctly for the agent and the agent can re-register to the vault successfully. (EV-75758, EV-75995)
•	If the agent tries to run a custom command but the associated batch file has been deleted or renamed, an error now appears in the VVAgent log. (EV-56903)
4.2  Known Issues
4.2.1  Agent Configuration, Backup and LogViewer Issues
•	When the Cluster Plug-in is installed with Windows Agent 9.21, 9.20 or 9.10, Windows CentralControl cannot connect to the agent on a cluster node but can connect to a cluster virtual server.
WORKAROUND: Use Portal to manage a Windows agent where the Cluster Plug-in is installed, or uninstall the Cluster Plug-in if it is not required. (EV-88357)
•	During a backup, if Windows deletes a snapshot that is required for the backup, the backup fails. This is more likely to occur on Windows 2022 than in earlier Windows versions.
WORKAROUND: Increase the amount of space that can be used for shadow copy storage. (EV-77598)
•	On a VMware VM with VMware Tools installed, system state backups sometimes finish with the following error in the backup log: O/S message: The filename, directory name, or volume label syntax is incorrect.
WORKAROUND: Upgrade VMware Tools to version 10.2.1 or later on the VM. (EV-69186)
•	When backing up to a directory on disk, the backup finishes but the following messages appear at the end of the backup log: general rpc failure and failed to upload configuration files. The resulting SSI files can be imported to the vault and used in restores, despite the error and warning messages. (EV-68953)
•	If you double-click a log (.XLOG) file on the agent machine, the log does not automatically open in LogViewer.
WORKAROUND: Right-click an .XLOG file and choose Open with > Choose another app. Select Always use this app to open .XLOG files and click Look for another app on this PC. Navigate to and select agentInstallationDirectory\Logviewer.exe, and click Open. (EV-86531)
•	If random characters appear beside the name of each language in the LogViewer language list, you cannot change the language for viewing logs.
WORKAROUND: Use Portal to view logs. (EV-69725)
•	If a job is seeded to a vault using Agent version 7.34 or earlier and reseeded using Agent version 7.50 or later, the vault storage size for the job data cannot be reduced. (EV-25740)
•	The agent cannot back up a UNC folder if the UNC path includes the uppercase German eszett character (ẞ). (EV-66281, EV-39526)
•	Running multiple UNC jobs simultaneously (to the same UNC path) from Windows CentralControl may fail.
WORKAROUND: Run concurrent UNC jobs from the command prompt. (24226)
•	Backups may fail over UNC path to or from a Windows operating system running an older Windows operating system. Microsoft does not support all Windows operating system combinations for UNC paths. Only those combinations supported by Microsoft are supported. (25579/23712)
•	On Windows 2012 with deduplication, when a backup job includes the deduplication chunk store, it may be backed up again by the system state job.
WORKAROUND: If backing up system state, exclude the deduplication chunk store data from the job backups to avoid multiple backups of the same data. (24228)
4.2.2   Agent Restore Issues
•	Granular Restore mount points may not be removed properly after a restore.
WORKAROUND: Reboot the server. (EV-8213)
•	Backup to a Satellite vault resets the status and location of safesets that exist only on the Base vault. If a safeset is available on the Base vault (but not on the satellite), the Agent may not restore unless you synchronize first. You must run a synchronize operation before you restore. Synchronizing provides updated status and location information about safesets on vaults. (20573/21168/21896)
•	Windows Server 2012 and 2012 R2 may not restore security streams properly when restoring to an alternate location in some circumstances (UNC path, backup mountpoint). This is Microsoft issue that they are currently addressing. (25780/25775/24166)
4.2.3  Plug-in Configuration and Backup Issues
•	After you restore a system from an Image backup using the System Restore application, synchronize the existing Image backup job and then run the backup job, the agent cannot find volumes to back up on the restored system. 
WORKAROUND: After restoring a system from an Image backup using the System Restore application, edit the existing backup job and select the volumes again. The next backup will be a re-read. (EV-67024)
•	After a new disk or volume is added to a server, the Image Plug-in cannot back up the disk or volume until the server has been restarted. Backup log messages do not indicate that the volume or disk was not backed up or that the server must be restarted. 
WORKAROUND: Restart a server after adding a new volume or disk. (EV-28948)
•	If the Image Plug-in backs up a system where a volume has an unsupported file system, and the volume is then reformatted as NTFS, the next backup log will contain the following error message: Reenabling CBT driver for <volume>. You can ignore this message; no action is required. (EV-87999)
•	When an Oracle database is first backed up after the database is changed from NOARCHIVELOG mode to ARCHIVELOG mode, the database’s archived redo logs may not be backed up.
WORKAROUND: Run the Oracle database backup job a second time after the database is changed from NOARCHIVELOG mode to ARCHIVELOG mode to back up the archived redo logs. (EV-19604)
•	When Cumulative Update 14 is applied to an Exchange 2013 server, an Exchange backup may fail with timeout issues.
WORKAROUND: Apply the following registry key to the Exchange server: HKEY_LOCAL_MACHINE\SOFTWARE\EVault\InfoStage\Agent\Ex2010SequentialValidation=1 (32388)
•	You cannot back up a SQL Server database that has an AlwaysOn replica in Microsoft Azure. (28055/28054/28053)
•	A backup job created on a physical node of a SQL Server 2012 cluster may fail (on the physical node) with a stream backup error. Note that this is not a supported backup scenario. There is no support for protecting databases on the virtual node with jobs created on the physical node. Support for backing up SQL 2012 on a virtual node in a cluster is available with the Agent with the Cluster Support Plug-in. (23622)
•	An Exchange DR job may fail if launched while a BMR job is running. 
Recommendation: A user should avoid running more than one backup of the same database at the same time.
WORKAROUND: To enable simultaneous backups, manually add the following section to the bottom of job .vvc file (located in the Agent installation directory):
1. vssadmin list writers, copy "writer name" and "writer ID"
2. Append the following section to BMR job vvc 
For an Agent 7.00.1039 and higher:
VSSWriterBackup001 {
  ID = <writer ID>       <<<<<<<<<<<< change to 
       copied "writer ID"
  Include = ".\*"
  InstName = 
  Name = Microsoft Exchange Writer       <<<<<<<<<<<< change to 
       copied "writer name"
  Options = 4
}
(23599)
•	If you reregister a different computer than was used for the original backup (reregister computer Y to the vault as computer X) and attempt to do another backup of the existing SQL VSS job, the backup may fail. A restore may still be performed successfully.
WORKAROUND: Create a new job and run the backup from the reregistered computer. (23270)
•	A database with a Simple Recovery Model may not run transaction log backups, but the error message in the log when the backup fails may not indicate this is the reason for the failure:  BKUP-E-04706 job will be forced to fail  BKUP-F-04110 job failed to complete  CAT -E-08056 backup aborted. (24811)
•	When the VSS backup warning: "Some hard links <> were not selected and have not been backed up.", a file within a selection has hardlinks and some of the hardlinks were not included. These hardlinks may be ignored, but the file and the hardlinks included in the selection may be backed up.
WORKAROUND: Manually include the folder(s) that contain the missing hardlinks. (20281)
4.2.4  Plug-in Restore Issues
•	When restoring files and folders from Image backups, agent services must be running using the local system account. If the local system account did not have full permission to the files and folders during backup, you might not have permission to access files and folders during the restore. 
WORKAROUND: Do one of the following:
•	Restore the whole volume and grant appropriate permissions.
•	Restore on a computer in the same domain using a domain account that has appropriate permissions. 
(EV-40706)
•	A database restore may fail in a mirroring environment when restoring with the "overwrite" option or "overwrite with no recovery" option. As per MSDN: While a database mirroring session is active, the following restrictions apply: 
•	Backup and restore of the mirror database is not allowed. 
•	Backup of the principal database is allowed, but BACKUP LOG WITH NORECOVERY is not allowed. 
•	Restore of the principal database is not allowed. 
(23359)
•	With Windows CentralControl, using Restore From Another Computer from a SQL standalone machine to a virtual SQL cluster, Restore to file on disk may fail and the wizard may disappear after you select the vault, computer and job. No Dump or Log file may be created.
WORKAROUND: Use Portal to run this type of Restore From Another Computer, or restore using the physical node. (23261)
•	Safeset bytes processed on the vault for a SQL job with a random read restore of SharePoint may be more than double the actual size of the safeset data. (25016)
•	A SQL restore may fail when restoring to an alternate database, under the same instance, with the overwrite existing database option selected.
Note:  This restore scenario is not supported as we do not rename the database files upon restore. 
Restoring this database may be accomplished if you remove or rename the original database file names before trying to restore. (23099)
•	When restoring a database to a SQL database other than the original database, the logical and file names may not be renamed to match the database where it is being restored. This feature is not supported by VSS. (22981)
•	Using Restore From Another Computer on a machine where the SQL Plug-in is not installed, a SQL safeset may be shared using an older UNC path format. (25907)
4.2.5  Install/Uninstall/Upgrade Issues
•	When you upgrade a non-English Agent from version 7.24 and attempt to register the Agent to Portal at the same time, the Agent may fail to register to Portal.
WORKAROUND: Instead of upgrading the non-English Agent, uninstall the Agent's program files only, and install the new Agent version to the same folder. (28032)
•	A silent install on Windows 2012 running Exchange 2013 may require an additional switch when running the command from Power Shell.
WORKAROUND: Run the silent install command from a command prompt.
Correct command: C:\Users\Administrator\Desktop> setup.exe /s /v"ACCOUNTTYPE=AutoCreate FEATUREEXCHANGE2010=On SILENTINSTALLDIR=C:\EVault /l C:\install.log /qn" /IAcceptExchangeServerLicenseTerms
(24368)
4.3  Limitations
•	Files might be excluded from a backup if they are specified in the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\BackupRestore\FilesNotToBackup or HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\BackupRestore\FilesNotToSnapshot registry key.
•	The Agent expands deduplicated data before backing it up, which results in larger-than-expected backup sizes.
•	You can only specify an IPV4 address when registering the Agent to Portal or a vault. IPV6 addresses are not supported. 
•	The Agent cannot back up files and folders in a DFS namespace in a UNC job. Instead, create a separate UNC job for each server share without using the DFS namespace.
•	The Agent cannot back up a volume that has the M-Files file system. BMR, system state and Image Plug-in backups do not succeed when a volume or mounted volume on the system has the M-Files file system, even if the volume is excluded from the backup.
•	Cross file system restores are not supported. The Agent cannot restore data from an NTFS partition to an ReFS partition, or from an ReFS partition to an NTFS partition.
•	The Image Plug-in is not supported with volumes created from Microsoft Storage Spaces Direct (S2D) storage pools.
•	The Image Plug-in cannot detect changes on multi-path disk devices. If a disk has switched to another path since the last Image backup, a full read is required and the backup takes a long time. 
•	The SQL Server Plug-in cannot back up a database in the following cases:
•	the database name includes one of the following special characters:  \ ’ ” , / : * ? < > | ^
•	the database has files in Microsoft Azure, and the SQL Plug-in is not installed on the Azure VM
In these cases, the SQL Server Plug-in skips the database that it cannot back up, but backs up other databases in the job.
•	If you back up a SQL Server database using Windows authentication and restore it to a different machine running Windows Server 2016, you will not be able to access the restored database. To avoid this limitation, back up databases using SQL Server authentication. Alternatively, use the System Restore application to restore the original machine.
•	After restoring a SQL Server 2016 database that is stretched to Microsoft Azure, you must run a stored procedure (https://msdn.microsoft.com/en-us/library/mt131016.aspx) to reconnect the local restored database to the remote Azure data. See “Restore the connection between the SQL Server database and the remote Azure database” on the Microsoft Developer Network website: https://msdn.microsoft.com/en-us/library/mt733205.aspx#reconnect
5 PRODUCT SUPPORT
5.1  Technical Support
Contact information for your provider is available through the Need Help button in Portal.
5.2  Product Updates
Product updates are available through your provider.
5.3  Documentation
The following documentation is available for Agent for Microsoft Windows (64-bit):
•	Server Backup online help (https://onlinehelp.evault.com) and knowledge base (http://support.carbonite.com/evault)
•	Release notes (this document)
•	User Guide