Allow GCC Environment tenant to use GP email function.

when we try to setup email under dynamics GP - Company email setup, we get error "An unknown error occurred". we had a case opened from Microsoft they figured out that currently GP is hard coded to use ‘.com/common’ for its URLs. So, I believe that confirms the issue that we are seeing where the URLs are switching from ‘.us’ to ‘.com’ when we try to authorize MFA emails. GP isn’t able to authenticate with a ‘.us/common’ URL, so it switches to ‘.com/common’ and fails.