“The administrative limit for this request was exceeded” When Enabling User for Exchange UM

Error: Unable to save Unified Messaging PIN for mailbox xxxx: The administrative limit for this request was exceeded.



After using my favorite search engine, I came up empty on this exact error message.  I did get a few hits on the generic “The administrative limit for this request was exceeded” message.

After a little research, signs were pointing me to the AD user account had a “runaway” attribute with too many entries in it causing other applications to fail when making changes to other attributes.  I reviewed one of the problem user’s attributes and found the userCertificate filled with a bunch of entries.



After clearing out the userCertificate attribute the mailbox was able to be UM enabled..

- See more at: http://www.get-exchangeserver.com/the-administrative-limit-for-this-request-was-exceeded-when-enabling-user-for-exchange-um/#sthash.DTrcWJ92.dpuf