When you try to update the Department field of user mailbox by Exchange Control Panel (ECP) portal in a Microsoft Exchange Server 2013 environment, and the length of value is exceeding 64 characters, you receive the following error message:
This behavior is by design. This issue occurs because the length of the Department field is hard defined.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 4024647 - Last Review: Jun 27, 2017 - Revision: 9