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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.
To fix this issue, install Cumulative Update 17 or a later cumulative update for Exchange Server 2013.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Learn about the terminology that Microsoft uses to describe software updates.
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