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Hi Grant Sommerfeld,
Welcome to Microsoft Q&A Forum! Have a good day and I hope you're doing well!
I know it’s frustrating when this suddenly changes, especially while your other accounts still show your name correctly. Let’s go step by step and see what’s going on.
I. First, check your display name in Outlook account settings
In New Outlook for Mac, please:
- Open Outlook > Settings
- Select Accounts
- Click the account that only shows the email address
Just under Description, look for fields like Your name / Full name / Personal information. Do you see something like “Your full name/Your email” there? Please make sure your Full Name is filled in correctly.
If the name is set correctly there but new emails still only show the email address in the From line, please try the next steps.
II. Clear the account cache (to avoid sync / data issues)
Sometimes a corrupted cache can cause incomplete or incorrect data to be used.
- In Outlook go to Settings > Accounts
- Select the problematic account
- Click Manage
- Choose Reset Account This forces Outlook to re-sync data from the server.
You can also follow Microsoft’s official guide here: Clear the cache in Outlook for Mac
After the reset finishes, please test again.
III. Remove and re‑add the account
If clearing the cache doesn’t help, try signing out/removing and then adding the account back:
- Sign out / remove the account: Sign out of an email account in Outlook for Mac
- Add the account again: Add an email account to Outlook for Mac
Once re‑added, check if your Full Name is correctly set and then test sending a message.
IV. Double‑check what the recipient actually sees
Sometimes Outlook’s From field in the compose window can look odd, but recipients still see the correct display name. Please try:
- Send a test email from the problematic account
- Send it to one of your other two accounts that are working correctly
- Open the received email on that other account and check:
- Does it show <yourfullname><youremailaddress>
- Or only youremailaddress without your name?
This helps us know if the problem is only in your local Outlook view or truly in what recipients see.
V. A bit more information to help pinpoint the issue
To get better insight and suggest the most appropriate troubleshooting path, could you please confirm what type of account this is?
- Is it a Microsoft 365 for Business / work or school account or is it an IMAP/SMTP account hosted by another provider?
I hope this information is at least partially helpful to you. If you have any concerns, questions, or if anything seems unclear or misunderstood, please feel free to reach out anytime.
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