Appreciate it, but I think that’s sorted.
Yeah, I actually tried what your kb suggests just through logic, but you’re looking at setting the reply to address etc. Not really what I wanted, I ended up needing to split the domains out and give my friend 8 sets of credentials - I don’t like how mail users are handled at all, I’d originally expected mailboxes to exist with a specific address. Splitting the domains out has worked for now.
Thanks for your help.