My organisation is experiencing a problem with MS Planner, where an error message is displayed when attempting to attach files to tasks. The error message is "You no longer have access to #FILENAME#".
This happens when using planner in both teams, and via the web portal.
This happens for all users of a specific team/group.
This happens for newly added users of this specific team/group
It is not related to the computer, as each user has their own computer. We have also tested with a fresh machine.
The problem has exsisted for a few months, so it's not a new/temporary problem.
We can create a new group/team in planner, and we have the ability to attach files no problem, so it appears to be an issue only with that specific team.
What is causing this issue and what is the resolution?