I have a user who has permissions of type Editor on another user.
When trying to create a new event in this user's calendar, both via Outlook and OWA, she receives the following error:
"Could not save event".
We have checked and the user has the Editor permissions correctly assigned.
We have also checked and the "Versions" folder is not full.
He has the Archive enabled in the Exchange Management Centre and a 1 day retention policy applied.