Microsoft Teams: Manage Team Settings
As a team owner, you can add or remove team members and guests, manage team and channel settings, and archive a team that's no longer in use.
Add or remove team members
In the teams list, go to the team name and select More options 
> Manage team.
You can manage these member settings:
To remove someone, select X to remove them.
To change someone's role, select the dropdown arrow and choose a role such as Owner or Member.
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To add someone, select Add member. Add a member from within or outside your org:
To add someone in your org, type in the name of who you want. Then, select Add.
To add a guest, type in their email address. Select the pencil icon to add a display name for them. Then, select Add
Manage channels
Go to the team name and select More options 
> Manage team.
In the Channels tab, you can:
Change team settings
Go to the team name and select More options 
> Manage team.
From there, you can access your team Settings tab, which lets you:
Add or change the team picture.
Set member permissions (like allowing them to create, update, or delete channels and tabs).
Enable @team or @[team name] mentions.
Enable @channel or @[channel name] mentions.
Set permissions for guests.
Enable team members to send GIFs, emoji, and stickers.
Manage and add Apps
Go to the team name and select More options 
> Manage team:
Archive a team
Select the Manage teams icon 
at the bottom of the teams list.
Select More options 
on the far right of the team name.You have the option to:
Delete the team to permanently delete it from your teams list along with all hosted channels, conversations, files, and the Microsoft 365 group for the team.
Archive team to mark it as inactive while keeping the team's mailbox, site, and files.
Restore team to restore an archived team.
Want more?
Change team settings in Teams
Add people to a team
Add guests to a team
Remove someone from a team
Archive or restore a team