I mean when CA PPM is supported in Windows 10
I hope you are asking for client side OS support and not server side.
Yes on client side…
Watch out for Armstrong release which is due next month.
Correct, Windows 10 is planned for the Client side OS in CA PPM Armstrong release.
Here is the list of supported Operating Systems for client computers accessing CA PPM;For Microsoft Windows OS; - Microsoft Windows 7 SP 1 32-bit and 64-bit, all editions - Microsoft Windows 8.1 32-bit and 64-bitFor more details you can refer to;https://docops.ca.com/ca-ppm/14-3/release-information/release-notes#ReleaseNotes-Compatibilities
NOTE: Scroll down to CLIENTS for compatibility matrix on Client computers accessing CA PPM.