Dears,
I have 2 servers: Server 1 is Domain Controller and Server 2 is the Backup, they synchronize with each other. At the pass, 2 DCs run normally with windows server 2008 R2 for a long time (about 5 years). Recently, I upgraded the OS of 2 DCs to Windows server 2012 R2. After upgrading the OS, I upgrade 1 software (The Symantec Backup Exec System Recovery 9.x to Veritas System Recovery 18.x )at Server 2 (The Backup DC). After that, I found 1 problem: If have any change at the Server 1, the server 2 (The Backup) can not synchronize the change but If have any change at the Server 2 (The Backup), the Server1 still synchronize the change.
Anyone can help me to fix the problem.
Thank you very much.