Disable Outlook Mailbox Auto-Mapping

When Microsoft released Microsoft Exchange 2010 SP1 we’ve discovered new feature that allows Microsoft Outlook 2010 and 2007 clients to automatically map mailbox to which a user has Full Access permission.

So if we add user Full Access permission to 10 mailboxes, he will all 10 mailboxes in his Outlook because these mailboxes will be automatically mapped in Outlook.

In Microsoft Exchange 2010 SP1 there was no option to turn this “great” feature off.

But when we get Microsoft Exchange 2010 SP2 we can use Exchange Management Shell (Exchange Powershell) to disable this feature.

When we use Exchange Management Console to add user Full Mailbox Permission to other mailbox, this mailbox will be loaded to user Outlook.


If we want to add user Full Mailbox Permission but we don’t want automap this mailbox to Microsoft Outlook we have to use powershell:

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Exchange 2010 SP2 RU1 RU2 RU3 and CAS to CAS Proxy Incompatibility

Exchange 2010 OWA

Exchange 2010 SP2 CAS Proxying

If any of you considering installing Exchnage 2010 SP2 with RU1 or RU2 or Ru3, the following information is addressed to you.


If your Exchange Organization have many Exchange Servers with CAS roles with different Exchange version, then after upgrade any of CAS server to Exchange 2010 SP2 with RU1 or RU2 or RU3 you can have problems with CAS to CAS proxying.

In scenario where an Exchange 2010 SP2 RU1 Client Access server is proxying to an earlier version of Exchange 2010 or Exchange 2007 Client Access server, then you are affected with a problem to use OWA.

In Event Log you can find errors like:

Event ID: 4999
Log Name: Application
Source: MSExchange Common
Task Category: General
Level: Error
Description: Watson report about to be sent for process id: 744, with parameters: E12, c-RTL-AMD64, 14.02.0283.003, OWA, M.E.Clients.Owa, M.E.C.O.C.ProxyUtilities.UpdateProxyUserContextIdFromResponse, M.E.C.O.Core.OwaAsyncOperationException, 413, 14.02.0283.003.

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