Add Members to a Team in Teams
If you're a team owner, you can add someone to a team. If you're not a team owner, you can submit a request and the team owner can then accept or deny it.
This topic is about adding members who are already a part of your team's org. If you want to add someone who's not a part of your org, see Add Guests to a Team in Teams
Add members to a team
For the latest limit on team sizes, see Limits and specifications for Microsoft Teams.
If you're a team owner, go to the team name in the teams list and click More options
> Add member.
Start by typing a name, distribution list, security group, or a Microsoft 365 group. You can also add people outside your org as guests by typing their email addresses.
When you're done adding members, select Add. You can make someone a team owner by selecting the down arrow next to Member. A team can have multiple owners. For more about roles and permissions, see Team owner and member capabilities in Teams.
Select Close. People that you add to a team will receive an email letting them know they are now a member and the team will appear in their teams list.
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