Yes Ham that has been frozen for 2 years is still safe to eat.
I've kept ham for as long as 2 years and even 3 years before in the freezer when I forgot about a couple hams at the bottom of the deep freezer.
The frozen ham was still safe to eat but had lost some of it's freshness but the ham was still pretty delicious.
Freezing the ham keeps bacteria away from the ham so that it cannot spoil so the ham remains safe in the freezer.
Ham is still good to eat as long as the ham has remained frozen the entire time.
When ham is kept frozen the ham will still be good for as long as 1 to 2 years in the freezer.
The ham loses it's freshness after the expiration or use by date has passed but it doesn't mean that the ham is bad as long as you've kept it frozen.
Ham will last in the refrigerator for up to 3 to 4 days but to keep it longer than that it should be frozen so that the freezing temperatures prevents bacteria from growing on the Ham.
If the ham does not smell sour or is not really slimy feeling then it's okay to eat.