When trying to discover or to process a computer with Resource Updating Manager (RUM), the following error is returned in the log:
Requesting remote agent version.
Error 0x721. A security package specific error occurred
It has been observed that this error occurs when QMM console and RUM are installed on Windows 2008 R2 and the computer being discovered is a Windows 2003 Server or an XP workstation.
Process the affected computers without discovering them, by using the 'Perform the task remotely (without agents)' option.
Using RUM create a package and install a second standalone RUM instance on another computer, ideally on a Windows 2003 machine.
The same error can happen when QMM console and RUM are installed on Windows 2008 R2 and the computer being discovered is a Windows 7 workstation. In this case installing and using a second RUM console on a Windows 7 computer eliminates the error.
Another step to try is to use a GPO and to configure all involved computers to IgnoreDelegationFailure, as explained the following article: http://technet.microsoft.com/en-us/library/cc778012(WS.10).aspx Note: a reboot is required after implementing this change.
If you receive the following warning during the discovery of a computer:
Warning: The Quest Migration Manager RUM Controller Service is not accessible. Error 0x00000721. A security package specific error occurred
Then this could be caused by the computer account (in this case QMM/RUM console) existing in both source and target domains.
For more information please see the following topic in the migration forum: