Unlock workflow activity The Unlock activity releases a lock that was previously placed by the Lock activity. To release a lock, specify the same lock key that was specified in the Lock activity. If the Lock activity had a Duration specified, and that duration has already passed, the lock will already be released. Input variables Input variables determine the initial behavior of the activity. Table 1. Unlock activity input variables Field Description Lock key The Mutex key that releases the lock. This key must match the key specified by a Lock activity. For more information, see Lock activity. States The activity state tells the workflow engine what to do with the activity. Table 2. Unlock activity states State Description Finished The activity successfully released the lock.