Exchange 2010 mailbox unavailable

[forkies]

Hi all,

 

I am having some deja vu here, we have a user who is getting a message saying her mailbox is unavailable in OWA and trouble connecting with Outlook. The event log on the exchange 2010 server reads:

 

Mapi session "1a111111-2222-33b3-c444-d55555d55ddd: /o=domain/ou=Exchange Administrative Group (QWERTYUI12POIUY)/cn=Recipients/cn=Forename Surnameaae" exceeded the maximum of 16 objects of type "session".

 

We had this issue before and did the IOS fix and also the regedit fix on "Maximum Allowed Service Sessions Per User" to 32. To get it working again I had to restart the IS service, however it then pulled her emails into outlook then came up with the same error. OWA still works though. She does not have any mobile devices syncing, but has Outlook on her MacBook and Windows PC. Also apparently on her iPad, all running latest updates. She is the only user affected.

 

The issue I have is she is a governor and is not in school so I am trying to diagnose over the phone, I think her Mac is brand new so probably the culprit as it has not happened before for her. Any ideas? TIA.