It appears that the ability to call the 'set-mailboxregionalconfiguration' cmdlet when using certificate based authentication with exchangeOnline v2 module stopped working sometime in the last couple of weeks (early/mid-April). Prior to that it was working just fine in our provisioning scripts. If I authenticate manually with a global admin account to exchangeOnline, the cmdlet works fine. Just wondering if anyone else has run into this and if there's a work-around? Have tried adding more rights on the app registration side of things to no avail. I know there's some other cmdlets that are also broken (rights-wise) via certificate based auth.