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Environment: Single exchange 2003 box, running on server 2k3. latest service packs applied. all but latest round of patches applied.

Symptom: A single user cannot view any meeting invite via IMAP/OWA. Works fine in outlook, but its a users who primarily uses linux, so thats not an option. They get HTTP 500 responses for every calendar invite they have. Tried in Firefox/Chrome/IE (7 on xp). This isnt new, its just being reported for the first time.

Nobody else is reporting the issue.

Ive certainly seen this here and there with corrupt invites, but not every invite in a mailbox.

Edit 2 (more detail): Its actually just updates & cancellations the error is occurring on. Also, updates and cancellations do not appear when the user connects via IMAP.

share|improve this question
OWA is known to not work so well with non-IE browsers. Maybe your user could try a different browser in his Linux environment? – Oldskool Nov 29 '11 at 14:36
updated writeup to reflect this - that was one of the first things i had him try – Devnull Nov 29 '11 at 14:43
up vote 1 down vote accepted

Adding the following registry entry solved the issue:


FixRecipientTrackStatusTime DWORD 1

I rebooted it after making this change, though the KB article does not indicate this is necessary. I have no idea if this was required or not - the machine needed it outside of this change.


share|improve this answer
I know that you're answering your own question, but just links are not encouraged as answers. You should put the content that helped you in your answer and then provide the link. – MDMarra Dec 14 '11 at 14:50
Sure thing, done – Devnull Dec 19 '11 at 15:10

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