Accept or deny pending requests
To accept or deny pending requests, go to your team in the teams list and select More options > Manage team > Pending Requests.
Request to add a member
To request someone be added to a team you're already a member of, go to the team in your team list then select More options > Add member. Type the name of one or more people then select Send request. Team owners will receive an alert that they have a pending request.
Add guests to a team
NOTE: you must be a team owner to add a guest in Teams
Select Teams and go to the team in your team list.
Select More options > Add member.
Enter the guest's email address. Anyone with a business or consumer email account, such as Outlook, Gmail, or others, can join your team as a guest. Guests must have a Microsoft 365 work or school account. If the guest doesn’t yet have a Microsoft account associated with their email address, they will be directed to create one for free.
Add your guest's name. Select Edit guest information and type a friendly name for them. Be sure to take the time to do this now as it cannot be changed later.
Click Add. Guests will receive a welcome email invitation that includes some information about joining Teams and what the guest experience is like.