I have brackets installed on my PC, but it's a client connect to an Active Directory domain.
Seems like a have some troubles installing Extensions like Emmet because my user directory is on domain server.
I've already check the rights on directory (i'm logged as Admin by the way), and i tried a manual install (upload .zip content into extensions directory and use npm install to install dependencies if necessary, but nothing seems to work properly.
Is there a way to change the Extensions directory in Brackets, or to resolve this issue ?
It sounds like you're hitting Brackets bug 8694 – please watch that bug for updates.
The only way to change the extensions directory currently is to clone Brackets from git (simpler than you might think!) and modify getUserExtensionPath() to return a different path.