IncrediBuild is not automatically triggered


I’m a build engineer, and recently have set up a build environment which uses IncrediBuild to compile our editor and game. I’ve noticed that, when I run the following command line manually from my PC or a build machine, XGE is used.

But if I run the exact command line from TeamCity, then IB is not used. Any idea why?

D:\p4\UE4\Code\Engine\Build\BatchFiles\Build.bat ProjectEditor Win64 Development Editor D:\p4\UE4\Code\Project\Project.uproject -waitmutex

Thank you,