i have a situation where a user sends out an invitation to a meeting using outlook. up until the point where the invitation is accepted, the item can be accessed via owa and synced w/activesync. after the invitation has been accepted, owa and activesync are no longer able to access the calendar entry - i get http/1.1 500 Internal Server Error in owa. no error in activesync but no syncing of the calendar item either. the outlook client is unaffected.
If the user removes the invitee and sends an update, the calendar item is accessible again.
sbs 2003 sp2, exchange 2003 sp2, isa 2004 4.0.2167.909