Since upgrading to Fedora25, evolution does not connect anymore to the exchange server outlook.office365.com anymore. The connection to the latter was/is configured through gnome's "Online Accounts" settings. This seems to be independent of wayland.
Simply speaking: the server does not show within the evolution interface.
I tested it also on a blank new user account on the fedora machine and tried to get the connection; did not succeed.
Should I consider this a bug? but of what? or how would you work towards making this work again? Cheers!
Edit in response to comments:
installing evolution-ews helped; but required restart of complete system; restarting the gnome session did not suffice.