Select your Xbox profile (or select Choose a profile and sign in to your account). Select My profile > Customize profile, and then select your current gamertag. Under Choose your new gamertag, enter the gamertag that you want in the available text box, and then select Check availability.

Reactions in Outlook is here to help! Important: Reactions are only available to individuals using a work or school account in Outlook with a qualifying Microsoft 365 subscription. Reactions only fully work when the reactor and the sender of the email both have Exchange Online mailboxes.