I can't connect to my Exchange account - Microsoft Support
https://support.microsoft.com/en-us/office/i-can-t-connect-to-my-exchange-account-372b793f-e8d3-4aed-a3a9-dbfbfad97c6d
WEBSolution: Verify your account settings. On the Tools menu, choose Accounts. In the left pane of the Accounts dialog box, select the account. Verify that the account settings are correct. Tip: To confirm that you are using the correct credentials, try to connect to your account from another Exchange application, such as Outlook Web App.
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