If you need to remove a user or group from an existing group, you can do so from Partner Center.
Remove users or groups from existing groups
- Go to Partner Center > Tasks > Users
- Click Groups
- Click > Edit group next to the group you wish to modify
- Click X next to the user or group you wish to remove
Note: If a user is part of a group in the Groups field, that user will continue to be part of the group you are editing. To ensure they are fully removed, you'll need to also remove them from any listed groups they are a part of.