Attempting to launch ArcMap fails and the following error message is returned:
Error: The ArcGIS Desktop Advanced license is in need of a repair operation. Please access the ArcGIS Administrator to repair your licenses.
The license in the trusted storage becomes untrusted due to changes made in the machine configuration. This can happen when moving license files from one machine to another, and the Unique Machine Numbers (UMNs) are changed. The licenses are no longer recognized as they are tied to the UMNs of the old machine.