WCF Max Instances seems to be limited to 10

Question

I have a simple WCF service hosted in IIS7.5 exposed over a wsHttp binding using message security and InstanceContextMode.PerCall

I have a simple UI that spins up a

Answer 1

Are you testing on a Windows Server or Windows 7? The reason I ask is that IIS on the client OS versions has a 10 connection limit. This is to prevent the client OS from being used in a server environment.