What is the confirmation of the legality of the OEM version of a product from Microsoft?

Question

Windows

The company has computers, bought a few years ago from another bankrupt company. Computers have Windows and Office OEM stickers. The software corresponding to these stickers is also installed on the computers.
Are these stickers on the case enough to confirm the legality of the installed software?
On the MS website it is indicated that the sticker on the case is a confirmation of the legality of the OEM license.
And how does this happen in reality when checked by the relevant authorities?

Answer 1

In reality, as a rule, if there is a sticker, everything is in order.
Accounting papers can be asked for, and it is better to have them - the principle here is that the more papers, the cleaner the ass.
In principle, they are not so difficult to make.

Answer 2

In reality, they require accounting documents confirming the purchase of computers with Windows, check the activation, the correspondence of the activation key to the key on the sticker. They can check the compliance of the motherboard with accounting documents (under the OEM license, only warranty replacement of the motherboard due to a malfunction is allowed).