While the warning may seem obtuse, it’s obviously referring to a message in a state of limbo. It exists in some kind of cache (and therefore only locally) but a

While the warning may seem obtuse, it’s obviously referring to a message in a state of limbo. It exists in some kind of cache (and therefore only locally) but all traces of it have been deleted on the remote storage. It actually makes sense to me, and I think MS handled this edge case very well. I actually cannot think of a better way to handle it.