Control Panel-> Administrative Tolls->Local Security Policy->Account Policy - change max password age to 0.
There is also command line versions:
net.exe user <user> /EXPIRES:NEVER /PASSWORDCHG:NO
or
WMIC USERACCOUNT WHERE "Name=<user>" SET PasswordExpires=FALSE
Sean Liming - Book Author: Starter Guide Windows 10 IoT Enterprise - www.annabooks.com / www.seanliming.com