I'm not quite sure what your concern is in this affair.
honesty is always the best way to go.
Not wise to lie in this instance as, if the adjuster has even the semblance of credentials, he/she will certainly be able observe evidence of where the damage took place.
The equipment "should" be covered in the insurance policy if it's an asset of the company. Why does the office location make a difference to the insurers?
Thal, why is your boss bothering to lie about this technicality? Sounds like she has a legitimate claim no matter where the equipment was damaged.
Btw, how many people work in the office, and are they being asked to all lie in a coordinated manner?