Messaging Gateway

Can I apply the same SSL certificate to multiple consoles hosting the same domains?  We have 2 inbound scanners to 1 console and 2 outbound scanners to another console, both console host the same mail domains.

Thanks

You say SSL certificates here, do you mean TLS? You would need a different TSL certificate for each hostname.

Alex,

Are you asking about the Control Center GUI certificates or are you asking about using TLS for MTA to MTA connections?

It looks like you have  CC -- 2 scanners (inbound) and CC - 2 Scanners (outbound). 
CC GUI Certs: Unless you are using wildcard certs, you should have a seperate cert for each Control Center unless you are OK with users ignoring the "invalid/wrong domain" warnings.

TLS Certs - each scanner needs it's own TLS cert.  And should be created by authority that can be verifyed by the other MTA.

Take a look at the knowledge base
http://www.symantec.com/business/support/knowledge_base_results.jsp?content=all&SearchTerm=Brightmail+TLS+certificates