I built a test environment in preparation for a migration I am doing. I have a 2007 and 2013 set up.

After I moved the test users from the 2007 exchange server to the 2013 server, they can no longer open the public folders still in the 2007 environment. The error is "the server mailbox cannot be opened because this address book entry is not a mail user.".

The Public Folders will eventually be migrated, but I want to ensure users will still have access to them as they are migrated. What step am I missing?

• Edited by IT2B Friday, April 17, 2015 5:50 PM

Hi IT2B,

Is there any update after referring to these links?

Best regards,

Hi IT2B,

Is there any update after referring to these links?

Best re

I have seen times where you need to disable the requirement for SSL for Internal client's Outlook Anywhere connections with Exchange 2013 and connecting to legacy public folders.  You can give that a try as well...

Get-OutlookAnywhere -Server <ServerName> | Set-OutlookAnywhere InternalClientsRequireSSL $false

Run this for all your Exchange 2013 Servers.

Looks like there are some steps I still need to take:

Configure legacy public folders where user mailboxes are on Exchange 2013 servers
https://technet.microsoft.com/en-us/library/dn690134%28v=exchg.150%29.aspx

On-Premises Legacy Public Folder Coexistence for Exchange 2013 Cumulative Update 7 and Beyond

http://blogs.technet.com/b/exchange/archive/2014/11/07/on-premises-legacy-public-folder-coexistence-for-exchange-2013-cumulative-update-7-and-beyond.aspx

• Marked as answer by IT2B 11 hours 13 minutes ago