Sending, receiving, and organizing email in Outlook.com
This usually happens when a third-party email address such as a Hotmail or other non-Outlook alias setup is affected by the known Outlook.com alias issue, and Outlook shows an address in the format outlook_[long series of letters and numbers]@outlook.com instead of the expected address.
The supported fixes are:
- Go to https://account.live.com/names/Manage and sign in.
- Check the aliases on the account.
- Set the Outlook.com or Hotmail.com address as the primary alias.
- If there is no Outlook.com or Hotmail.com alias available, create one by choosing Add email and a new alias and then Create a new email address and add it as an alias.
- After the primary alias is corrected, remove and re-add the account in Outlook for Windows if this issue is happening there.
If Outlook for Windows keeps showing the numbered Outlook address, Microsoft’s workaround is to set up the account manually as IMAP or POP instead of using the default setup:
- Close Outlook.
- Press Windows key + R, type
outlook /profiles, then select OK. - In Choose Profile, select Options > New.
- Enter a new profile name and select OK.
- Select Advanced options > Let me set up my account manually.
- Enter the password and select Connect.
- If setup fails, select Change Account Settings and enter the mail server settings from the email provider or the POP/IMAP server reference.
- In Choose Profile, select Set as default profile.
If the issue is on Outlook.com web and the alias list already shows the Hotmail address correctly as primary, the documented fix is still to make sure the correct Outlook.com/Hotmail alias is primary and then remove and re-add the account where applicable.