evolution 3.22.2

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!

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Edit in response to comments:

installing evolution-ews helped; but required restart of complete system; restarting the gnome session did not suffice.