Steps to re-build the SYSVOL DFSR replication group without demoting or promoting a domain controller.

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  1. Backup and Clean Up:
    • Begin by taking a backup of your Active Directory (AD).
    • It is recommended that you delete the existing CN=Domain System Volume,CN=Dfsr-LocalSettings on all domain controllers (DCs).

  1. Stop DFSR Service on All DCs:
    • Open the Services management console (msc) on each DC and stop the DFSR service.

 

  1. Create Registry Values and Keys on the Primary Domain Controller (PDC):
    • On your PDC (assumed to be DC-01.labpso.local), navigate to the registry key:
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\DFSR\Parameters\SysVols\Promoting SysVols
    • Create the following DWORD value:
    • “Sysvol Information is Committed”=dword:00000001
    • Create a new key under Promoting SysVols with the domain name (e.g., local):
    • [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\DFSR\Parameters\SysVols\Promoting SysVols\labpso.local]
    • Set the following values:
    • “Is Primary”=dword:00000001
    • “Command”=“DcPromo”
    • “Parent Computer”=“”
    • “Replicated Folder Name”=“labpso.local”
    • “Replicated Folder Root”=“C:\Windows\SYSVOL\Domain”
    • “Replicated Folder Root Set”=“C:\Windows\SYSVOL\sysvol\labpso.local”
    • “Replicated Folder Stage”=“C:\Windows\SYSVOL\staging areas\labpso.local”
    • “Replication Group Name”=“labpso.local”
    • “Replication Group Type”=“Domain”
    • Note: The “Is Primary” value should be 1 only on the PDC; it should be 0 on other DCs.

 

  1. Start DFSR Service:
    • The CN=Domain System Volume will be recreated under CN=Dfsr-GlobalSettings,CN=System,DC=.
    • All created registry keys and values will be deleted.
    • You’ll see DFSR Event 4602 on the PDC.

  1. Create Registry Values and Keys on Other DCs:
    • On every other writable DC (not Read-Only DCs), create the following registry key:
    • [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\DFSR\Parameters\SysVols\Promoting SysVols]
    • “Sysvol Information is Committed”=dword:00000001
    • For each DC, create a key under Promoting SysVols with the domain name (e.g., spiceworks.com).
    • Set the following values (similar to the PDC):
    • “Is Primary”=dword:00000000
    • “Command”=“DcPromo”
    • “Parent Computer”=“DC-01.labpso.local”
    • “Replicated Folder Name”=“labpso.local”
    • “Replicated Folder Root”=“C:\Windows\SYSVOL\Domain”
    • “Replicated Folder Root Set”=“C:\Windows\SYSVOL\sysvol\labpso.local”
    • “Replicated Folder Stage”=“C:\Windows\SYSVOL\staging areas\labpso.local”
    • “Replication Group Name”=“labpso.local”
    • “Replication Group Type”=“Domain”

 

  1. Start DFSR Service on Other DCs:
    • The CN=Domain System Volume will be recreated.
    • DFSR Events 4614, 6805, and 4804 will be written when the server successfully replicates SYSVOL.
    • Replication may take a few minutes to start.

 

  1. Assess the Need for Forcing Authoritative/Non-Authoritative Reinitialization:

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