How do I know what extensions I have for arcgis for server 10.2?

[NateTorola]

I need to see if network analyst extension is installed / added to publish a routing service.

[JonathanQuinn]

You can sign into ArcGIS Server Manager > Site > Software Authorization.

[NateTorola]

Thanks, that is what I was looking for.  On previous versions I had to dig into text files and run post-install utilities or something like that.  This is much clearer.

Thanks,

Nate