Hi SJMP,
This issue may be cause by connection optimization feature in Outlook 2007. When we are using Internet Access or proxy environment
which is considered to be a less perfectly connection than Internal Access by Outlook 2007. Some optimization features, such as
default gateway check, failover DNS query to WINS, etc. may cause connection issue.
Disable optimization feature in Outlook 2007 by modify the value of DefConnectOpts key to 0. In this way, Outlook 2007 will act same as
Outlook 2003
1. Click Start, click Run, type regedit in the Open box, and then click OK.
2. Locate and then click the following subkey:
HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\RPC
3. On the Edit menu, point to New, and then click DWORD Value.
4. Type DefConnectOpts, and then press ENTER.
5. Right-click DefConnectOpts, and then click Modify.
6. In the Value data box, type 0, and then click OK.
7. Exit Registry Editor.
8. Restart Outlook 2007 and test the issue. What is the result?
For more information, refer to the following KB article.
Error messages when you try to connect Outlook 2007 to Exchange Server: "The action cannot be completed" or "Your Microsoft
Exchange Server is unavailable" or "Cannot start Microsoft Office Outlook"
http://support.microsoft.com/kb/913843
In case that the above step doesn't fix the issue, did you get any error message in Outlook 2007? If so, take a screen shot of the error
and send it to me at (e-mail address removed).
If anything is unclear or if you have any other concerns, please don't hesitate to contact me.
Regards,
Emily Lin
Microsoft Online Partner Support
Get Secure! -
www.microsoft.com/security
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