APM SSO acrossed multiple domains.

Hi all, I have been told this is possible but, am not sure just how ad I cant get any info on it elsewhere. Is there any way I can have an SSO profile work across multiple domains. I have an few apps that sits on one VS but has 7 different DNS names. Each is secured with basic auth but, when the user passes from one domain to another they have to re-authenticate. Thoughts on how to make this SSO work for all 7 domains?

 

 

Thanks