Follow these steps if you are having trouble signing into Outlook with your Microsoft 365 account:
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Step 1: Start with the onmicrosoft.com Address
• First, try signing in using the @myorg.onmicrosoft.com format email address.
– Example: joe@myorg.onmicrosoft.com
• Use the same password as your normal email account.
⚠️ This will fail — do not worry.
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Step 2: Fresh Authentication Session
• This attempt will open a fresh authentication session inside the Outlook app.
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Step 3: Sign In with Your Correct Credentials
• Outlook will then prompt you to sign in again.
• This time, enter your correct email address in the standard format:
– Example: joe@mydomain.com
• Provide your normal email password.