Users are suddenly reporting a strange problem where they cannot delete other users' messages, but only certain emails. Through mailbox rights we grant users access to other user's inboxes to cover their emails while away.
They log into their own Outlook profile and add the other user's mailbox through Account Settings in order to access them. This has been working fine for ages, but all of a sudden, users are complaining that they cannot delete certain emails, seemingly at random. They can delete most emails, but one in about 10 they cannot, and get the error message:
"Some items cannot be deleted. They were either moved or already deleted, or access was denied"
Now I know the items have not been moved or deleted. If I log on to the profile of the user in question (ie who's mailbox it is), the email is sitting there in the inbox, and can be deleted fine. The problem only shows up when another users is accessing the mailbox.
Sounds to me like permissions, but why it's only on some emails I have no idea. The mailbox rights I grant in order to allow them access to a mailbox are Delete Mailbox storage, Read permissions, Change permissions, Take ownership, Full Mailbox access.
Please can anyone shed any light?