I coded for ECMA 2.0 for web application using WCF  and deployed the management agent dll in Extension folder with WCF config file named as app.config . I am getting the error at creation of Management agent in FIM synchronization at the time of  Refresh Interfaces as The Extension could not be instantiated. May be FIM is unable to read WCF config file from extension folder of FIM sync. Or is there any other thing m missing? . Can any body suggest me.

Could it be some code in your constructors or global variables that cannot be initialized? The error points to some code bugs in the initializing part of your ECMA

Did you manage to resolve this?

Have you tried to put it directly in Synchronization Service binary root folder?

In the past when we needed to have config file for our MA we have put it in Synch engine folder and registered as app section within either dllhost.exe.config or miisserver.exe.config. THen we had no problem with accessing it.