How to accept meeting requests from external users

Do you want to accept meeting requests from external users in Office 365 / Exchange? With the setting -ProcessExternalMeetingMessages on the Set-CalendarProcessing cmdlet you can do just this!

1. Connect to Powershell for Exchange (here’s how to do that).
2. Use the following command:
   
   Set-CalendarProcessing -Identity room@domain.tld -ProcessExternalMeetingMessages $True

That’s about it! Now all external users will be able to book the room.