powershell: how to remove a calendar for many users?

mfranhind115 

I'm not sure if you're talking about Exchange Server or Exchange Online - and I'm not particularly experienced with the latter, but with the former, you may be able to deal with this using Get-/Set-MailboxCalendarFolder and Get-/Set-MailboxFolderPermission.

It's been a fair while since I've worked with Exchange Server but I do remember having to set (which includes removing) the permissions a subfolder within the mailbox calendar, too, but this may just be a relic from the past. The subfolder related to the free/busy information but the name of it just isn't coming to me at this point in time.

You might also want to drop the question into the Exchange forum, where the people that work with such things everyday might be of more assistance - particularly with Exchange PowerShell.

• Get-MailboxCalendarFolder (ExchangePowerShell) | Microsoft Docs
• Set-MailboxCalendarFolder (ExchangePowerShell) | Microsoft Docs
• Get-MailboxFolderPermission (ExchangePowerShell) | Microsoft Docs
  • V2 commandlet: Get-EXOMailboxFolderPermission (ExchangePowerShell) | Microsoft Docs
• Set-MailboxFolderPermission (ExchangePowerShell) | Microsoft Docs
• Remove-MailboxFolderPermission (ExchangePowerShell) | Microsoft Docs

A good starting point would be to run Get-MailboxCalendarFolder -Identity "user:\Calendar", where "user" is the user who sent out the invitation, and see if anything shows up. Same thing for Get-MailboxFolderPermission (or the V2 equivalent of Get-EXOMailboxFolderPermission.)

These might help guide you on which Set- or Remove- command to follow up with. For example, back in the day (when I was young!), you'd usually find something had been granted on the ":\Calendar" mailbox folder in which case you'd remove it.

I haven't talked about the Get-/Set-/Remove-MailboxPermission commandlets here because they don't fit with the scenario you outlined about invitations being sent, but they are worth being aware of in case any stray users have been granted access to more than just the calendar.

Cheers,

Lain