@Mario-Jakovina said in Is it legal? Windows 10 or 11 as a server:

Why would anyone "be happy to report client" to any other vendor (here Microsoft) for violating any agreements between you customer and other vendor?

That's not what is being reported. The thing being discussed is violating the contract between the client and the vendor, for which @CCWTech is a legal representative. This is a business partner relationship and not reporting it would be a violation of the partnership.

Think of it like if you and a friend opened a cafe together. You own 90%, your partner owns 10%. A thief steals from you but only your partner witnesses it. They steal enough to qualify as grand theft (this isn't a petty situation like a candy bar or a coffee, this is more like someone stealing the espresso machine) and your partner knows about it. Would you be okay with your partner not telling you and not informing the accountants to write off the loss? Of course not, he'd be helping steal if he did. He has a business responsibility legally and ethically. You don't have to prosecute the thief if you decide not to, but you have a legal right to know that it happened and your accounting team needs that information for tax reasons and other data analytics.