You use the Disabled User Names window to identify and enable user names that are disabled on Essbase Server:
To enable a disabled username, in the “Disabled user names” list, select the username, and click the appropriate single arrow button.
To disable a username that you previously enabled, in the “Enabled” list, select the username, and click the appropriate single arrow button.
To move all usernames from one list to another, click the appropriate double arrow button.
alter user (MaxL) in the Oracle Essbase Technical Reference