Microsoft Tech Support Policy

So in recent days I have been advised by Microsoft that they cannot provide me with support resolving a windows 10 activation issue. I replaced a motherboard for one of my clients and it failed activation even after reentering the key. Everything looked as it should be to activate. I went to Microsoft for support and they refused to help me because i am a technician ..not the owner of the PC. This policy of not providing tech support to computer repairers because they are not the owners of the system is ridiculous. I am interested to know if anyone else has had similar experiences from microsoft "support"

I didn't find the right solution from the internet.
References:

http://www.techist.com/forums/f9/277877/

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