Q1. Would analysts from two different windows domains are able to login?
Answer : EEM version will allow you to add any number of domains and user from each domain can log into the application using their domain\userid format to login.
Q2. Is it right that this works only with EEM?
Answer: Yes, this has support only for Windows environment AD (Microsoft Active Directory) and no cross-platform applications recommended.
Q3: Does EEM supports single-sign-on?
Answer: Using SSO the user will be prompted with userid/ password initially until the next logout out from the application.