sign validation win7 vs win10 with trusted root cert

Hello!

I have an windows 2008 r2 certificate authority with couple of client certificates and root cert.

I do a digital sign of the sample document by one of client certificate, then i add root certificate to trusted in adobe reader dc version 2018.011.20055.

Then i validate signature on windows 7 and have success. There is green mark and signature is valid.

Then i do absolutely same things on windows 10 machine with latest updates and get yellow mark and message "signature validity is unknown".

I broke my head, please say what wrong i do?