If your domain controllers are running Windows 2012R2, it is advisable to use DFSR for the SYSVOL folder. Since Windows Server 2016 (build 1709), it is no longer possible to install a domain controller in an environment using FRS.
To migrate to DFSR, the domain functional level must be in 2008, the AD environment must be in good health (dcdiag). When increasing the domain functional level, the FRS to DFSR migration is not automatic, Microsoft provides a migration tool (dfsrmig.exe) on the domain controllers.
Migration takes more or less time depending on the number of DCs and the quality of the link between them. It takes place in 3 stages:
- Preparing the environment by creating a new SYSVOL_DFSR folder that will be replicated with DFSR.
- Changing the SYSVOL share pointing to the SYSVOL_DFSR folder.
- Delete the old SYSVOL folder and stop the FRS service.
Migrate SYSVOL folder from FRS to DFSR
On a domain controller, open a command prompt in Administrator mode and enter the following command:
dfsrmig /setglobalstate 1
Check the status of the migration by entering the following command:
It is also possible to check the overall status of the migration with the following command:
We can now go to step 2 of the migration by entering the following command:
dfsrmig /setglobalstate 2
Go to step 3 by entering the command below:
dfsrmig /setglobalstate 3
From the Active Directory Users and Computers console with advanced features enabled (View / Advanced Features), it is possible to see the replicated folders before DFSR in System / DFSR-GlobalSettings / Domain Systel Volume.
On a server where the DFS Admin Console is installed, you can add the SYSVOL (Domain System Volume) folder to the console to generate reports.