Weird ExchangeOnline Output - Get-MailboxFolderPermission

Recently a colleague of mine noticed something by accident; He was attempting to get the Calendar permissions for a particular mailbox but for got to add the colon, and instead wrote: “Get-MailboxFolderPermission -Identity\calendar”.

This provided him with a list of users that all have Owner or Author access at the Top of Information Store for the mailbox in question, which is weird. Furthermore, if you try: “Get-MailboxFolderPermission -Identity” You get a very different list of permissions, the same if you try “Get-MailboxFolderPermission -Identity\calendar” which is the proper way to look for calendar permissions.

We tried this with multiple people in our tenant, and they are all identical.

Does anyone know why those permissions would exist, or if they actually impact anything?


I’m willing to provide more information if it’s needed, I would like to get to the bottom of this.


Thank you everyone,