After installing the backup agent on a DC, the DC does not appear in the list when you select the Backup Agent Management node from the RMAD console.
解决办法
Confirm the backup agent is installed on the DC
Confirm the backup agent service is started
Confirm port 3843 (or the port you selected for the agent) is open between the RMAD server and the DC
Confirm the DC is a member of a computer collection
If the DC is not a member of a computer collection, add it to one and then right click Backup Agent Management and select Discover All Backup Agent Instances