The people on your team need a user account before they can sign in and access Microsoft Teams.
The easiest way to add user accounts is to add them one at a time in the Microsoft 365 admin center.
Repeat the above steps for more user accounts.
On the left side of Teams, click Teams, at the bottom of the teams list, click Join or Create a team, and then click Create a new team.
Once you've created the team, invite people to join it. You can add individual users, groups, and even entire contact groups (formerly known as "distribution lists").
Find the team that you created, click More options ËËË > Manage team.
Then go to the Members tab. Find the people you want to designate as team owners.
Under Role, click Owner.
Find the team that you created, click More options ... > Add channel. You can also click Manage team and add a channel in the Channels tab.