When you no longer need the exclusive ability to change a member, you can unlock it. The main reason to unlock a member is to abandon work on the member, in which case you can use the Revert command. In views where there is no Sandbox context for the member you are unlocking, you can use the Remove My Lock command.

You can downgrade your exclusive lock to a non-exclusive lock, in order to enable another user to get the exclusive lock. Depending on the permissions your administrator has defined, you may also be able to downgrade another user’s exclusive lock to a non-exclusive lock, in order to be able to give yourself an exclusive lock. To remove locks for another user, use the Locks view. For information on permissions and on your locks policy, contact your administrator.