Symptoms
The Title attribute for a user contains more than 64 characters. When you try to modify and save user properties in the Exchange Admin Center (ECP), you receive the following error message:
There are errors on this page. Please fix the highlighted fields and try saving again.
However, this problem does not occur when you use Exchange Management PowerShell.
Resolution
To resolve this problem, install Cumulative Update 12 for Exchange Server 2013.