Below are the requirements for VSS to function when backing up from an SMB share hosted by a Windows File Server.:
For more information on the VSS for SMB File Shares feature, see the following Microsoft page:
Do the following, with administrative privileges, to install the File Server role and the File Server Shadow Copy Agent role service on each file server:
Add-WindowsFeature -Name File-Services,FS-VSS-Agent
The user context in which the shadow copy is performed must have the backup privilege on the remote file server(s) that is part of the shadow copy set. Usually, this is done by adding the user that is performing the shadow copy to the Backup Operators group on the file server(s).
To add a user to the local Backup Operators group, do the following with administrative privileges on each file server:
$objUser = [ADSI]("WinNT://domain/user") $objGroup = [ADSI]("WinNT://fileserv/Backup Operators") $objGroup.PSBase.Invoke("Add",$objUser.PSBase.Path)
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