Over on the Exchange 2007 mmc I’m seeing this error:
As documented there….
One of the common warnings that you might get is about a corrupted Discovery Search Mailbox. As you can see in this short video, this warning appears in Exchange 2007 Management Console right after the Exchange 2013 installation.
There are no Discovery Search Mailboxes in Exchange 2007, and this mailbox is created by Exchange 2013 setup. The ‘RecipientTypeDetails’ 536870912 is the correct value and you should not modify it in ADSIEDIT or delete and recreate the mailbox as suggested by some guides. Exchange 2007 is not aware of such RecipientType and hence, the warning message which you should completely ignore.
Another resource I’m reading is here … http://msexchangeguru.com/2013/05/10/exchange2013-migration/
Blogging my way through a proof of concept migration from SBS 2008 to Essentials 2012 R2 series will be a SMB kitchen project whitepaper. More about the SMBKitchen project at – http://www.thirdtier.net/enterprise-solutions-for-small-business