#7 - Aug. 16, 2018, 5:50 p.m.
If your friend grants levels to one of your Allied Race characters, it makes your character ineligible to receive the Heritage Armor.
If you grant levels to one of your friend's characters, that won't effect your eligibility for the armor.
But only the recruited player accumulates levels that can be granted, so that would be your friend. If they were to grant any of those levels onto your Void Elf, that would make your Void Elf ineligible for the armor.