The following table lists group administration activities that are logged when an admin or a user creates or changes an Office 365 group or when an admin creates a security group by using the Office 365 admin center or the Azure management portal. 

Friendly name
Added group
Add group
A group was created.
Added member to group
Add member to group
A member was added to a group.
Deleted group
Delete group
A group was deleted.
Removed member from group
Remove member from group
A member was removed from a group.
Updated group
Update group
A property of a group was changed.