When you try to remove an ActiveSync device from either the Exchange Management Shell or the Exchange Administration Center, you receive the following error message:
WARNING: An unexpected error has occurred and a Watson dump is being generated: DeviceId cannot contain hyphens.
This problem occurs because the CNF value conflicts with the ActiveSync device.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 3137384 - Last Review: Mar 15, 2016 - Revision: 1
Microsoft Exchange Server 2013 Enterprise, Microsoft Exchange Server 2013 Standard Edition