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Titel
Connecting to Exchange on-prem getting The remote server returned an error: (401) Unauthorized. -
Beschreibung
When connecting to Exchange on-prem in On Demand Migration for Email (ODME) the connection is failing with "The remote server returned an error: (401) Unauthorized." when UserPrincipalName/SMTP is used. -
Lösung
Domain\User for login should be used instead of UPN/SMTP login when establishing connection in ODME when the error is encountered.