To add members:
On the sidebar menu, tap .
Open the group.
In the membership bar, click .
In the Update Members pop-up, tap .
In the Add Members pop-up, select the people or groups you want to add.
Alternatively, search for a person or group to add.
Note: You can't add outside users (people outside your company) to a group. Outside users' names appear in purple text, and they have icons () after their names.
To remove members: