Is there a limit to the number of SANs that are supported on a single certificate? What would happing in a multi tenant environment where multiple companys with multiple domain names use the same Edge server?

hi,

You can have any number of SAN entries and Multi Domain bypass the Edge server.

http://blogs.technet.com/b/cs2010/archive/2012/01/09/microsoft-lync-server-2010-multitenant-pack-for-partner-hosting-deployment-guide.aspx

 

Would it be supported to have a Multi Tenant edge and a normal Enterprise Edition pool? Is there any performance hit by having many SANs on one cert? Could I have multiple edge pools linked to one topology?

The SAN field limitation is mostly imposed by the issuing Certificate Authority and different public CAs have varying upper-limits.  I've seen certs with over 100 SAN entries and am not aware of any measurable impact on performance.

You can use multiple Edge pools and and then configure the Access Edge SRV record for each domain to point to the desired Edge server/pool for sign-in.  You'll need to have multiple Front End pools though (but this is normal as the internal servers scale out before the external servers in most cases).

Thanks a lot Jeff. Which cert providor would you recommend for a cert with a high number of SANs?

Hi Jeff,

I know this is an old post, but wondered if you could clarify you final comment about having to scale out the pool if introducing multiple edge pools?

Is it possible to have a few Edge Pools all utilizing the same Front-End Pool?

Thanks,

Steve