Hello
Thank you for your question and reaching out.
In Registry Editor, locate and click the following registry subkey:
Go to Registry HKEY_CURRENT_USER\Software\Microsoft\Exchange
On the Edit menu, point to New, and then click DWORD Value.
Type AlwaysUseMSOAuthForAutoDiscover, and then press Enter.
Right-click AlwaysUseMSOAuthForAutoDiscover, and then click Modify.
In the Value data box, type 1, and then click OK. -> Reboot your Computer
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