principalsIncludingAliases := []string{}
	for _, principal := range principals {
		isTrustDomainBeingEnforced := isTrustDomainBeingEnforced(principal)
		// Return the existing principals if the policy doesn't care about the trust domain.
		if !isTrustDomainBeingEnforced {
			principalsIncludingAliases = append(principalsIncludingAliases, principal)
			continue
		}