Allow Modern Authentication to use the "Connect Exchange" feature under Calendars and Contacts
The customer is attempting to use the "Connect Exchange" feature under Calendars and Contacts to connect their users' desktop clients to their on-prem Exchange 2019 mailboxes is failing with a generic "An error has occurred, make sure the information is correct" error. They had disabled basic authentication on their Exchange server's virtual directories some years ago per recommendations from Microsoft their cybersecurity insurance carrier.... if I temporarily re-enable basic authentication on the EWS virtual directory on our server, and change nothing else on the server's end or in the RingCentral client, using the exact same information is able to connect successfully without error. The customer is hoping that they can use modern authentication. They need to be able to sync calendar and contacts info from their mailboxes without compromising the security on their server.
Sonia
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