Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Dear Ali Hamis,
Thanks for choosing Microsoft community!
We're sorry about add email aliases to a user, automatic is currently not possible, as only administrators have this right, for more details, please kindly refer to: Add another email alias for a user
This does cause a lot of inconvenience, so I think your suggestion is very meaningful, if it is convenient, please upload your suggestions to Feedback, I believe that Microsoft officials will continue to improve themselves after seeing your valuable suggestions, and your suggestions will help more and more users in the future, making the work more and more efficient and time-saving. For reference: Learn about how to provide feedback to Microsoft
Thanks for your patience and understanding! Hope you all the best!
Best regards,
Kerry