Alternative Host not working

Yes I know the alternative host needs to be in your same organization- and they are. im creating zoom rooms with alternative hosts that are a part of the same plan (we're all under a university) and some accounts zoom recognizes and zoom doesnt recognize other accounts. i know for a fact the emails that aren't working have been attached to a zoom account, so im not sure what the problem could be. is there any service i could use to manually appeal this, and get those zoom accounts registered? or is there no way?