Hi.
I have a user who has been granted permissions to view 3 of her colleagues calendars - she has editor permissions on each calendar.
The user is having an issue where these permissions are continually appear to be lost on a random basis - she can still see the calendar, but can only see Free/Busy on any entry and cannot edit or add any new entries.
To fix this, I have to use Powershell to remove, then re-apply the permissions to the calendar in question.
I've spoken with Microsoft regarding this, however the only real solution they could give me was to ask the user to use Outlook to download the latest version of the OAB when this happens and this should resolve this (not had the chance to try this yet as it has not happened again since I spoke with Microsoft).
They also suggested that iCloud might be the cause of this (the users who's calendars she see's all use iPhones) - however I checked with one of them and they do not have any calendars switched on on their iPhone, so I've kind of ruled that out.
So, I was wondering if anybody else had witnessed this kind of behaviour?
Thanks in advance for any help!