Environment
Retain Unified Archiving 4.x
Situation
When selecting Device Management | Add Devices | completing the Display Name and Email Address | selecting Add User, the following error appears:
Exception: Router URL and Rest URL are undefined!
Resolution
In the Retain Mobile Module for Android configuration, under the Tenant ID, deselect the box for Use Message Router and Save Changes.
Now when selecting Device Management | Add Devices | completing the Display Name and Email Address | selecting Add User, the users device will properly appear in the Device List.