Identity Recovery:
You can recover and register to the original identity of the guest device endpoint only if you log in as the new identity by VO (that is by login identity). You can log out either by VO or Sequential Registration.
If you log in by Sequential Registration (that is by TN or hardware port ID) and log out by either VO or Sequential Registration, the endpoint does not recover its original identity. Sequential Registration changes and stores the TN for later use.