Currently running Outlook 2003 and all office updates applied as a clean new install. Now here is whats happening. In production mode when initially replying to all on an email the user can send emails. However, when the application is closed and re-opened an error message of The messaging interface has returned an unknown error appears when clicking replying to all . The reply and forward continues to work but not the reply to all .
We have done the following:
1- Removed all add-ins and performed a detect and repair Works once then error returns.
2- Uninstalled Office 2003 and reinstalled with every update
3- Installed CCleaner and removed Outlook 2003 with this utility as well
4- Disable Antivirus and windows firewall
We are currently running (this one and only PC) in Outlook safe-mode where the replying to all works without problems even after closing the application.
Outlook is setup to connect to our internal exchange server (2007).
The only step left is blow out the PC and start from scratch PS this is a new PC and has a few programs load in the past but was working fine. If anyone has any ideas it would be greatly appreciated.
Background: Outlook 2007 previously installed and removed. Reason: The User (Sr Management VP) believed it was causing a problem with his Treo 650p. Totally unrelated since Outlook was not linked to the Treo in any way. Both the PC and the Treo used independent internet connections to access the exchange server. Therefore, it was uninstalled as per his request. The Treo has a problem with versamail which has been fixed and working correctly.
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