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Outlook 2007 and RPC over HTTP Issue

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  • Outlook 2007 and RPC over HTTP Issue

    Hi to All.
    We have an exchange 2003 ent sp2 mail server and a lot of XP sp2/sp3 clients that connect with RPC over HTTPS.
    When we create a new mailbox for a new user or reinstalling outlook 2007 for an existing user, we aren't be able to connect exchange by RPC over HTTP.
    I tried a lot of suggestions found in internet but the problem persist.
    The clients that can connect exchange works both in LAN and in internet.
    This issue is very strange because it is happened last week.
    There is someone with the same problem or someone that has a solution.
    Excuse me for my bad english.
    Thanks a lot

  • #2
    Re: Outlook 2007 and RPC over HTTP Issue

    I have resolved.
    The issue was determined by the fact that our exchange server was also a domain controller and global catalog.
    The system attendant does not load the DSProxy component on a server that is both a global catalog server and an Exchange server.
    I removed the global catalog, restart exchange system attendant and everything was back to work.

    I found the solution here: (EXCHG.65). aspx


    • #3
      Re: Outlook 2007 and RPC over HTTP Issue


      Its great to know you have resolved the issue by removing GC but that was not required. If your exchange is installed on GC then we need below reg key to make Rpc over https working:-
      1. Start Registry Editor.
      2. Locate and then click the following registry subkey:

      On the Edit menu, point to New, and then click Multi-String Value.
      Note Make sure that you select the correct value type for the registry subkey. If the registry subkey type is set to anything other than Multi-String Value, you may experience problems.
      1. Name the new registry value NSPI interface protocol sequences.
      2. Right-click NSPI interface protocol sequences, and then click Modify.
      3. In the Value data box, type :-ncacn_http:6004
      Last edited by Dks; 13th March 2011, 00:14.

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