Users Migrated from Exchange 2003 -> 2010 can not access public folders through Outlook but OWA works fine.

We are currently running a exchange 2003/2010 mixed environment. A small portion of our population has been migrated to exchange 2010 and are thoroughly testing my deployment. Due to a future groupwise connector we will not be removing out 2003 exchange server for quite some time. Replication is working well and all 2010 exchange users can access their public folder via the Outlook Web Application.

The Issue - Users cannot access public folders via Outlook 2003 or 2007 but can via Outlook 2010.

We are on SP1 with RollUp 3-v3
dominick_marinoAsked:
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SujitNCommented:
I assume that the Affected users mailbox's are in E2k10.
If that's the case, check if the Encryption is enabled on E2k10 Server level. If it is disable it.

Set-RpcClientAccess -Server "Server Name" -EncryptionRequired $False


-SN
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SujitNCommented:
Hello,

Whats the error message poping when tried to access or expand the PF's from Outlook 2003 or Outlook 2007?


-SN
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dominick_marinoAuthor Commented:
Via Outlook 2003 they receive "Unable to expand the folder. The set of folders could not be opened.

If using 2007 they receive "Cannot expand the folder. The attempt to log on to Microsoft Exchange has failed".

If they click "ok" to the error popup and attempt to open the public folders again they see the message "Cannot display the folder. Microsoft Office Outlook cannot access the specified folder location. Could not open the item. Try again.".

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dominick_marinoAuthor Commented:
Thank you for the reply. You are correct, affected users are on Exchange 2010. We have already disabled encryption on Exchange 2010 so that the transition for 2003 users is seamless.

-Dominick
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SujitNCommented:
Thats strange!! But, I am sure the resolution would be something silly...!! :)
Outlook 2010 works fine, OWA works fine Only Outlook 2003 and Outlook 2007 affected..!!
Well, try :-

-Rebooting the Mbx and CAS server
- Make sure RPC service is started.

-SN
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dominick_marinoAuthor Commented:
Thanks again for the prompt replies.

While working on this issue I have rebooted the Mbx and Cas server but not after I had applied RollUp 3. I'll do another reboot tonight. I just checked the RPC service and it is running on both servers however the "RPC Locator" is not started in either. Not sure if that matters though.

From my research it seems like it could have something to do with exchange Public Folders only being visible under the (2003) First Administrative Group and not in the (2010) Exchange Administrative Group (FYDIBOHF23SPDLT) why viewing from the 2003 Exchange System Manager. I'm hesitant to drag them over as I'm worried they will fail for my 2003 users.

Still learning. I'm having an enjoyable crash course in exchange migrations :).
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dominick_marinoAuthor Commented:
The link below looks remarkably similar to what we are experiencing with the exception that we have Exchange 2010 not 2007 and we still have our exchange 2003 server in production.

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_25632417.html
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SujitNCommented:
Not really Dominic. Moving the Folder Hierarchy to Exchange Administrative Groups will not cause any such problem...!!
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dominick_marinoAuthor Commented:
Eureka! http://blogs.technet.com/b/thbrown/archive/2010/01/16/cannot-access-public-folders-from-outlook-2003-2007-after-moving-users-mailboxes-to-exchange-2010.aspx

SujitN, looks like you led me to a solution, the article above has to be the answer as it show our exact error messages. I had encryption disabled for the mailboxes but not the public folders. I have updated this and it is still not working though. Should I restart some services? If so what would you advise? Worst case I'll reboot tonight and give you 500 points :).
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SujitNCommented:
I would suggest you to reboot the servers tonight...
And I would love to get that 500 Points.. :):)
Just kidding..! :)

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dominick_marinoAuthor Commented:
SujitN's comments led me to the proper search results.
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