The migration tool for the DFS Replication service, dfsrmig.exe, is installed with the DFS Replication service. This tool migrates SYSvol replication from File Replication Service (FRS) to Distributed File System (DFS) Replication.

What is Dfsrmig?

The migration tool for the DFS Replication service, dfsrmig.exe, is installed with the DFS Replication service. This tool migrates SYSvol replication from File Replication Service (FRS) to Distributed File System (DFS) Replication.

What is USN rollback?

A USN rollback occurs when an older version of an Active Directory database is incorrectly restored or pasted into place. When a USN rollback occurs, modifications to objects and attributes that occur on one domain controller do not replicate to other domain controllers in the forest.

How do I convert FRS to DFSR?

In order to migrate from FRS to DFSR its must to go from State 1 to State 3. This step can’t be reversed. This completes the migration process and to verify the SYSVOL share, type net share command and enter. Additionally, be certain in each domain controller FRS service is stopped and disabled.

What is difference between FRS and DFSR?

For starters, FRS is only capable of replicating whole files, while DFSR replicates changes at the block level. This greatly reduces the amount of data that must move between domain controllers and can reduce WAN capacity requirements for larger environments significantly.

Is Sysvol using FRS or DFSR?

Windows 2000 Server and Windows Server 2003 use File Replication Service (FRS) to replicate SYSVOL, whereas Windows Server 2008 uses the newer DFS Replication service when in domains that use the Windows Server 2008 domain functional level, and FRS for domains that run older domain functional levels.

How do I know if I have FRS or DFS?

Determine if FRS is being utilized by the Domain Controllers

  1. From an administrator Command Prompt on a domain controller run DfsrMig /GetMigrationState and DfsrMig /GetGlobalState.
  2. navigate to System.
  3. navigate to Domain Controllers
  4. Note: to find the share.

How do I check my USN rollback?

One way to detect a USN rollback is to use the Windows Server version of Repadmin.exe to run the repadmin /showutdvec command. This version of Repadmin.exe displays the up-to-dateness vector USN for all domain controllers that replicate a common naming context.

What is USN number?

An update sequence number (USN) is a 64-bit number in Active Directory that increases as changes occur. Local counters on every domain controller assign USNs. Whenever an object is changed, its USN is incremented.

How do I enable DFSR?

Open Server Manager, click Manage, and then click Add Roles and Features. The Add Roles and Features Wizard appears. On the Server Selection page, select the server or virtual hard disk (VHD) of an offline virtual machine on which you want to install DFS. Select the role services and features that you want to install.

How do I know if I have sysvol FRS or DFSR?

How to verify the SYSVOL replication state (FRS or DFSR)

  1. Logon to TMDC01 as Administrator.
  2. Open an Administrative Command Prompt.
  3. Type Dcdiag /e /test:sysvolcheck /test:advertising >c:\sysvolcheck.

Why is DFSR better than FRS?

We also highly recommend that you migrate replication of the SYSVOL share from FRS to DFS Replication because DFS Replication is more robust, scalable and has better replication performance than FRS.

How can you tell if Sysvol is replicated?

If you start the “DFS managment” console, under replication. If you can see Domain System Volume or can add the same, you have the sysvol replicated using DFS-R.

How to migrate FRS to DFSR using dfsrmig?

Guide to migrate FRS to DFSR using DFSRMIG 1 Log in to domain controller as Domain admin or Enterprise Admin 2 Launch powershell console 3 Type dfsrmig /setglobalstate 3 and press enter 4 Type dfsrmig /getmigrationstate to verify all domain controllers have reached eliminated state

How do I rollback a DFS migration step?

In order to rollback this migration step, an administrator can run the dfsrmig.exe tool and set the global migration state back to 0 (‘START’ state) or 1 (‘PREPARED’ state). This command will cause the DFS Replication service to cycle through the reverse set of steps that were taken during migration.

Can I run dfsrmig on a read-only domain controller?

You can run the dfsrmig command on any domain controller, but operations that create or manipulate AD DS objects are only allowed on read-write capable domain controllers (not on read-only domain controllers). To set the global migration state to Prepared ( 1) and to initiate migration or to rollback from the Prepared state, type:

What is the result of dfsrmig/getmigrationstate command?

All Domain Controllers have migrated successfully to Global state (‘Prepared’). Migration has reached a consistent state on all Domain Controllers. Succeeded. This example shows typical output from the dfsrmig /GetMigrationState command when the local migration states on some domain controllers do not match the global migration state.