Outlook 2003 Free/Busy issues after migrating to Exchange 2010

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I've got an interesting one here that is hopefully a quick fix. After migrating to Exchange 2010 and moving the PF replicas to their new E2K10 server, users on Outlook 2003 cannot see the Free/Busy info for Resources (conf. rooms) that are into next year. We can, however, see the Free/Busy via Webmail and Outlook 2007. It seems very sporatic too. On my Outlook, I can see one of the Resources Free/Busy, but not another (whereas prior I could not see either one of them beyond Dec. 2010). Could this be RPC Encryption on the system folders? If so, how do I remove it? When I do a Get-RPCClientAccess, the encryption is denoted as False for the all the servers w/ PF and Mailboxes. Karl


OK, even more interesting. If you wait 5-10 minutes, the Free/Busy Schedule eventually populates. Huh?Karl

Novak Wu

You can update the Outlook 2003 user profile with RPC encryption for a test.

1. In Control Panel, open the Mail item.

2. Click Show Profiles.

3. Select your profile, and then click Properties.

4. Click E-mail Accounts.

5. Select View or change existing e-mail accounts, and then click Next.

6. Select the Microsoft Exchange Server account, and then click Change.

7. In the dialog box that contains your mailbox server and user name, click More Settings.

8. In the Microsoft Exchange Server dialog box, click the Security tab.

9. Click to select the Encrypt data between Microsoft Office Outlook and Microsoft Exchange Server check box, and then click OK.

10. Click Next, and then click Finish.

11. Click Close, and then click OK.

For more information, please refer to the following article:


Does Free and Busy display normally?


Novak Wu


This is a bit more of a bug/issue than I expected. Been working with MS PSS for over a week now and they have even recreated the problem (they think). Will post the solution (if there is one) after we are done.


Tom Vanopoulos

Have you also looked at the following KB?

Users who use Outlook 2003 cannot publish their free/busy data in Exchange Server 2010 or in Exchange Server 2007


MCITP: Enterprise Messaging Administrator 2007/2010 | MCITP: Server Administrator | MCTS: Windows Server 2008 Applications Infrastructure, Configuring | MCP | MCDST

Novak Wu

Hi Karl,

Thank you for your update and I understand that you have contacted our Phone Support. If there is any update or solution, please share it to us.


Novak Wu
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