A group can be edited by a group administrator only. Below are the steps to edit a group:

1. All the groups accessible by you will be listed under the 'Groups' option in the left panel. Upon mouse hovering on a particular group and clicking on the edit icon, the 'Edit Group' popup will appear on the right side of the screen as shown below.

2. Using the 'Edit Group' option, you will be able to edit group name, and description, add new or remove existing group administrators as well as add new or remove existing group members for selected groups.

3. Turn the 'Active' switch button on or off to make the selected group active or inactive respectively. A group can only be deactivated once the status of all its tasks is completed or cancelled. Deactivated groups will remain accessible to all group members; however, new messages or tasks cannot be created within them (unless reactivated by group administrators).

4. Click 'Save' once done to complete editing the group.