To move people between teams, you must first remove them from one team and then add them to the other. 

Follow the process below

How to remove people from a team 

1. Go to Teams
2. Select the team from the list
3. Select Manage or Add Team members 
4. Use the search box and or filters to find the people you would like to add to the team. 
5. Select the people using the tick box or add buttons
6. Select Proceed
7. A pop-up will show to confirm 

How to add people to a team

1. Go to Teams
2. Select the team from the list
3. Select Manage or Add Team members 
4. Select the option under People to add team members 
5. Use the search box and or filters to find the people you would like to add to the team. 
6. Select the people using the tick box or add buttons
7. Select Proceed
8. A pop-up will show to confirm