Konica Minolta bizhub C451 Operation Manual page 38

d) Enter the [E-Mail Address] and the
[Password] that you registered and then click
[Login].
e) Click [OK].
f) Click [Deactivate License Code].
g) Enter the [MFP Serial Number] and then
press [Retrieve].
Issued by BT-CSO 38 Ver 1.03