Selected a computer in RUM and tried to migrate but migration fails with "Access Denied" error.
To resolve the issue please follow the instructions outlined below and perform 3 steps:
1. In RUM go to Tools - Options - Service Account.
Specify an account from source domain which is member of Domain Administrators group in source, specify in this format: sourcedomain\username
2. Then on console machine (where QMM is installed) go to My computer - Manage - Local Users and Groups - Groups - Administrators and add this source account to the Administrators group on console machine
3. In target domain in Active Directory Used and Computers find the container Builtin, find the group Administrators and add to this group the source account which you specified in RUM.
QMM console machine (where RUM is installed) needs to be in target domain and when logging on to this machine you should use a target account which has local admin rights on this console machine.
Now computer migration should happen without receiving an error "Access Denied".
For more ideas and information please review also SOL13550 - Troubleshooting Suggestions and Recommendations for Computer Migration using RUM (Resource Update Manager).