There's one user where if he sends out a Calendar invite to certain recipients, they will periodically and repeatedly receive a "Meeting cancelled" message. That's even if the sender didn't actually cancel the meeting. And this may continue after the event period has ended.
I don't think it happens with every invite.

I've tried an Analyse/Fix database on the user account. Not sure where to troubleshoot.

Any pointers will be appreciated.

GroupWise 14.2.2
Build: 129487