Use
Before you can administer a server with the Enterprise Manager, you have to register it in the Enterprise Manager. To register a server you need to specify the:
Procedure
The following assumes that you are not using the wizard to register the server.
The dialog box Registered SQL Server Properties appears.

Set the option Show system databases and system objects. This makes the system databases such as master and msdb visible and enables you to administer them in the Enterprise Manager.
Confirm your entries with OK.
The SQL Server is now registered and will appear in the Enterprise Manager under the server group you have specified.

If you later wish to change the options you have selected, simply highlight the server in the Enterprise Manager and choose Action