It should work 99.9% of the time.
will it go through and propagates when you set an addon domain registered from namecheap while the main site is from godaddy?
i have a site XXXX.com registered in godaddy and its nameservers are hostgator. then i register a domain from namecheap. can i set the domain from namecheap as an addon domain?
i really thought i didn't work since its almost 48 hours yet has propagate. but i now see it thanks.