I should also add that we're working on getting this squared away. It's hard / nearly impossible for us to actually tell when a product sold from a distributor and was received by the customer, so our typical process (back when I was more involved with this) was to add something like 6 months to the stated warranty term, which more than covers 99.99% of products sold by distributors. They don't like to hold stock, so usually things rotate through their inventory pretty quickly. However, things happen, and we try to take care of folks that these things happen to.
Instead of assuming that all stores renew their stocks in 6 months at maximum, Couldn't Keysight believe in the customers proof of purchase, like invoices, fiscal documents, etc, all contains the final customer purchase date.
The way Keysight handles this is troublesome in my opinion, the customer sees an 3 years warranty advertisement, but that 3 years counter is started when the store/reseller buys the item, not when they sell it. And I don't know of one unique seller that says that date.
The customer only can know that after he bought the equipment, consulting Keysight how much time remains from the advertised 3 years.