X-OWA-Error: Microsoft.Exchange.Data.Storage.ConnectionFailedTransientException

server1 - DC - win 2012 standard R2

server2 - MS - win 2012 standard (NOT R2) + Exchange 2013

Per Microsoft Tech Support - On the DC - Had to wipe and install win 2012 R2 because of a problem with the OS

Now I get the following error in OWA when accessing any user account created after going to win 2012 R2.

X-OWA-Error: Microsoft.Exchange.Data.Storage.ConnectionFailedTransientException
X-OWA-Version: 15.0.847.32
Date: 8/29/2014 8:00:20 PM
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George SasIT EngineerCommented:
Is this happening for ALL users ? For specific users ? For shared mailboxes ? Please give some details.
trodelepostAuthor Commented:
I figured it out... While running Server 2012 on the Domain Controller... I could logon as the Administrator in OWA and then Open another Mailbox... like fredflintstone... and manage his Auto-Responders... but with Server 2012 R2 on the Domain Controller... I CANNOT do that anymore... I must logon to OWA as fredflintstone... in order to make any changes.
George SasIT EngineerCommented:
I do not think this is the case.
I think this is because you do ot have the appropriate permissions on the Administrator account.
You need to delegate "Administrator" permissions in the Exchange to be able to do this.


Here is also a nice very good article on the RBAC :

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