I have 4 Trio 8800s that sync fine with Office 365 Room Resources.
I have 1 Trio 8500 that, thus far, I cannot get to sync with a Room Resource. Software version
Exchange URL is set to https://outlook.office365.com/ews/exchange.asmx but the Exchange status is blank as opposed to "Synchronized."
I see from another posting the recommendation to turn off OAuth 2.0 on the 365 side to fix this for the 8500, but I don't think that's even an option. Not sure and certainly not in the direction that Microsoft is heading.