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Effective October 1, 2022, Microsoft began disabling Basic authentication for Outlook, EWS, RPS, POP, IMAP, and EAS protocols in Exchange Online. This means that for TeleMessage import sources using Exchange will no longer work with simple username and password authentication, instead OAuth 2.0 authentication must be used.


Azure Active Directory is now Microsoft Entra ID.

Register application in Azure


Step 8 - The two other values we need from the application is the application (client) id and the directory (tenant) id. Both can be copied from Overview:

Configure TeleMessage import source

On the Import source configuration page, select OAuth 2.0 for Authentication Mode, and set Application (Client) ID, Application (Client) Secret, Directory (Tenant) ID to their respective values from the registered Azure application above.