Outlook 2010 calendar sharing with Outlook 2003 RRS feed

  • Question

  • Office Version:Office 2010Operating System:Windows XP
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    We are running Exchange 2007 with most of our clients using Office 2003 (Outlook 2003).  We are in the process of upgrading our Office environment from 2003 to 2010.  In this mixed environment (Outlook 2003 and 2010 hitting Exchange 2007 servers) we are having problems with people opening shared calendars.  In particular when a Outlook 2003 user tries to open a shared calendar of someone using Outlook 2010 they can open the calendar and see the entries.  However, if they try to open a specific calendar event it will not show them the details of the event.  The default access to all calendars is set to "reviewer".

    Outlook 2003 users have no problem opening and viewing details of other 2003 users.  And 2010 users have no issues opening and viewing details of other 2010 users or 2003 users.  The issue only exists when a 2003 user tries to look at calendar entry details of a 2010 user.

    Any help would be greatly appreciated since we are an organization of 14,000+ and we will be working in this mixed Outlook 2003/2010 environment for some time.

    By the way...

    If a 2010 user adds a specific person as a reviewer in Calendar Properties, Permissions tab, it works fine, but we cannot individually add 14,000+ users by name

    Thursday, July 22, 2010 2:01 PM


All replies

  • What's the error message when the user in outlook 2003 access the calendar in 2010?

    Outlook 2003 need RPC encryption requirement with exchange 2010 mailboxes:



    Friday, July 23, 2010 9:20 AM
  • Have you any updates?

    Did you solve your question?




    Your expertise never fails to impress!
    Tuesday, July 27, 2010 3:08 AM
  • How did you get on with this? I'd be interested to know...
    Wednesday, August 4, 2010 6:05 PM
  • Hi

    Is it outlook 2003 users connecting to an exchange 2010 mailbox?

    I've had the issue where Outlook 2003 users connecting to an Exchange 2010 mailbox cant open each others shared calendars. I think I've fixed the issue by increasing the RCAMaxConcurrency throttling. I detailed the process in my blog . It seems that Outlook 2003 doesnt close its RCP connections when opening calendars which can cause exchange to stop accepting connections. Might be something to look into. I might also be interpreting your question wrong though



    Thursday, August 12, 2010 1:51 AM
  • Hi Justin, i can work through the get and set-throttling policies but when i then try and enter rcamaxconcurrency 100 in under identity it says rcamaxconcurrency doesnt exist on servername.walescoop.com although it is looking at the exchange 2003 server name rather than the 2010 one where im entering this info in via the exchange management shell - any ideas?
    Wednesday, October 13, 2010 11:44 AM
  • Hi all. I'd just like to add my own woes to this thread. We are suffering the same issue in our organisation.

    In the process of migrating from Exchange 2003 to Exchange/Outlook 2010, so we require full cross-compatibility between 2003 and 2010 clients and mailboxes whilst groups of users get moved over to the new exchange.

    Our problem is that when a user who still has an Outlook 2003 client (regardless whether the mailbox resides on Exch2010 or 2003) tries to access a shared calendar of a user, who's mailbox is on Exchange 2010, they receive an error stating that the connection to the MS exchange server is unavailable, then a further message saying that Outlook is unable to open the set of folders.

    Weirdly, if the user closes and reopens Outlook 2003, they will then be able to open a single shared calendar before it breaks again.

    E.g. User1 (2003 client) attempts to open User2's (2010 mbox) shared calendar. User 1 has no problem doing this. However, if User 1 then attempts to open User3's calendar (another 2010 mbox) it will fail with above errors.
    Now, if User1 restarts Outlook, and attempts to open User3's calendar again, it will work. BUT, if User1 attempts to open User2's calendar again in the same session, it will fail.

    Appointment requests are also broken when when a 2003 client attempts to set up a meeting with a user on a 2010 mailbox. Appointments can be sent from a 2k3 client and received in the 2010 mbox, but when the user on 2010 tries to accept they receive an internal NDR.

    This is a very strange problem and has taken my team all morning just to get the exact symptoms straight in our heads. We still confuse ourselves when trying to detail the problem and have found pictures generally explain them better. Sadly we cant draw here.

    Thanks, Greg.

    Monday, January 10, 2011 2:48 PM
  • Hi, I am getting a very similar problem also.


    We are in the process of moving from Exchange 2003 to Exchange 2010 with Outlook 2003/2007/2010.


    Users with Outlook 2010 can access shared mailboxes regardless which server the mailbox is on.

    Users with Outlook 2003 cannot access shared mailboxes regardless which server the mailbox is on.


    However a user who has Outlook 2010 on their desktop machine can access the shared folders but if they log on to Terminal Servers which has Outlook 2003 then they can't access the shared folder which opened in Outlook 2010.

    This is very odd and frustrating as it is holding up our transition to our new server.

    Thanks, Stephen.

    Wednesday, January 12, 2011 2:42 PM
  • We are about to face this issue, and I would love to know if anyone has solved the issue. Or come up with a work-around.
    Tuesday, January 24, 2012 6:19 PM