Yes, I continue to see this problem too. While hibernating a PC certainly
almost always "breaks" this connection, it continues to happen randomly even
when I do not hibernate the PC.

"davisr65" wrote:

I too have just upgraded from Outlook 2003 to 2007, and all of our
secretaries are complaining of the same issue when accessing shared
calendars....

Thanks...

Rob Davis

"Trumpeter" wrote:

I am running Outlook 2007 in an exchange 2003 environment. For 2 of the
shared calendars I access, most times I try to display them, I get an error
that says "The messaging interface has returned an unknown error. If the
problem persists, restart outlook." It doesn't fail 100% of the time, but it
does usually fail. I have access to 5 other calendars that work fine. I
double-checked the permissions on the 2 that work, and I have author-level
permissions. The affected calendars display properly for other users in the
office who are running outlook 2003.

I've seen the error on the knowledge base with regards to printing a shared
calendar, but not for simply displaying them, as I am trying to do. Anybody
have any insights?