change email address then immediatly add previous as alias

Question

I have an exchange online account:
eh@mybusiness.com

I want to change the account to be:
bee@mybusiness.com

I then I want to immediately add the alias eh@mybusiness.com to the account so it will continue to receive emails while we phase out that address.

Can I immediately add the previous email address ass an alias after changing it so I don't miss any emails?

Thanks.

Answer 1

No need to remove it.
Simply add the new address: bee@mybusiness.com
then make it the primary Reply Address and both addresses will now be associated with that account
https://learn.microsoft.com/en-us/exchange/recipients-in-exchange-online/manage-user-mailboxes/add-or-remove-email-addresses#use-the-new-exchange-admin-center-eac-to-add-an-email-address