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Microsoft 365 Certified: Endpoint Administrator Associate · Microsoft
Select one answer.
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To ensure that User1 can sign in to Outlook on the web using the email address [email protected] , you should modify the UPN of User1. The User Principal Name (UPN) is the login name for Office 365 services, and it needs to match the email address the user is trying to sign in with. Since the UPN currently is [email protected] , changing it to match the email address [email protected] should resolve the sign-in issue. So, the correct answer is: D. Modify the UPN of User1.
UPN is the ONLY attribute used for account login (not email or aliases). The answer is D - change the UPN to match the email address that the user wants to log in with.
D is correct