User in Exchange 2013 mailbox cannot access Public Folder in Exchange 2010


  • Dear All,

    I am going an Exchange 2010 to Exchange 2013 migration project, with Exchange 2010 SP3, and Exchange 2013 Cumulative Update 2 installed on one Exchange Organization. (Single forest-single domain)

    Exchange 2010 environment consists of two servers, with one on each AD-site (No DAG). Each Exchange 2010 server hosting Mailbox, Transport, and CAS role. Public Folder is configured by using replication between two servers.

    Exchange 2013 environment consists of eight servers, with four on each AD-site (DAG is planned, but still not configured). Four servers on each site consist of two mailbox (backend) servers and two CAS servers. Windows NLB is configured between two CAS servers. Autodiscover DNS record is using NLB's IP address. Public Folder is residing on Exchange 2010. It is still not configured and not migrated to Exchange 2013 Public Folder.

    Most users is still on Exchange 2010 mailboxes. We did migration on five Exchange 2010 users to Exchange 2013 mailboxes. All migrated mailboxes are still cannot open Public Folder.

    On Outlook client residing Exchange 2013 mailboxes, display message window "Cannot expand the folder. Microsoft exchange is not available. Either there are network problems or the exchange server is down for maintenance. (/o=...)".

    Some outlook client prompts credential for connecting to Public Folder at most of the time. Users still could send and receive messages, though. I am sure all Outlook versions have complied with Exchange 2013 System Requirements, i.e Outlook 2013, Outlook 2010 Service Pack 2.

    I also have done resolution from , using the same setting, but accessing public folder by Exchange 2013 users is still not working at all. 

    Any advices for resolution to this case are appreciated. Thanks a lot.

    Thursday, November 14, 2013 8:55 AM


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