Share a calendar between 2 organizations

Copper Contributor



We have 2 tenants for 2 companies (CompanyA and CompanyB).


We would like to share the room reservation schedule between the 2 companies.


To do this, we created the conference room, then we set up the federation between the 2 tenants. Here is the link :


The manipulation was of course performed on each of the 2 tenants.


After several weeks, the link is still not working. I can't open the calendar since the second tenant.


A ticket has been opened with Microsoft support, but the technicians in charge are incompetent and unavailable.


Does anyone have the same problem or a solution?


Best regards,

1 Reply
Did you adjust the permissions on the rooms themselves? And what exactly is the error you're seeing? There's a very detailed troubleshooting guide you can follow: