Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hi Shani,
An alias is another email address that people can use to email existing Office 365 account.
For your reference: Add another email alias for a user.
You can find alias emails by clicking Admin>Users>Active Users>Assigned user's name.
And you can't edit alias email after you created them.
If you have any concern about that, I’d like to suggest you create a new UserVoice to improve our products better for you and others. I appreciate your understanding.
Thanks,
Neo