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Outlook 2016 login to a Mailbox of Exchange 2016, but it won' t access the Public Folders of Exchange 2010

Posted on 2016-07-21
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Last Modified: 2016-09-30
Exchange 2010 and Exchange 2016 Coexistence. Some users' mailbox have moved to Exchange 2016 from 2010. the company Public Folders still in Exchange 2010. those users are able to access the public folders of exchange 2010 by using outlook 2013, but outlook 2016.
as I know, Outlook 2016 access exchange 2016 server by using MAPI over HTTP. after I did disable the MAPI over HTTP in regedit, and force to use RPC over HTTP, the public folder showed up in outlook 2016, but it was unable to open.
is there anything I need to do next?
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Question by:awucrail
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Old User earned 2000 total points
ID: 41723838
First thing to do is disable mapi on the 2016 server, run this on the 2016 exchange powershell.

Set-OrganizationConfig -MapiHttpEnabled $false running this will switch all outlook 2016 clients to use rpc instead of mapi without the registry change. This may fix the public folder issue but I would then migrate the public folders to 2016. Full details here.

https://technet.microsoft.com/en-us/library/mt463355(v=exchg.150).aspx
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Author Comment

by:awucrail
ID: 41723852
Thank you Dave. I did run the command: Set-OrganizationConfig -MapiHttpEnabled $false. after I relogin to the outlook,  the outlook connection status showed protocol: HTTP. it is not RPC over HTTP.
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by:Old User
ID: 41723855
That is the correct result, and the public folders?
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Author Comment

by:awucrail
ID: 41723859
No. it is still no public folders show up.
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LVL 11

Expert Comment

by:Old User
ID: 41723860
This is a known issue MS were supposed to release a hotfix I am not sure if it is available.
Are you able to migrate the public folders to 2016?
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Author Comment

by:awucrail
ID: 41723863
Not yet. I need to move all mailbox to the exch 2016 first.
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by:Old User
Old User earned 2000 total points
ID: 41723868
Please see below from MS

Which clients support public folders?

Outlook 2010 and later, and Outlook 2011 for Mac users can access public folders. However, users whose mailboxes are on Exchange 2016 servers won’t be able to connect to Exchange 2010 public folders from clients that use Exchange Web Services (EWS), such as Outlook for Mac. We recommend that you migrate legacy public folders to Exchange 2016 in order to maintain access for those users.
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Author Comment

by:awucrail
ID: 41723872
Thanks Dave for the info. It looks like i need to do that.
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