[TIMOB-23862] Xcode 8: Adhoc distribution-builds fail with code-sign error

I just received a report about an enterprise-app that cannot be exported for production when having Xcode 8 (Beta 6) installed. The build command: {quote} /usr/local/bin/node /Users/xxxx/.appcelerator/install/5.5.0-5/package/node_modules/titanium/lib/titanium.js build run --platform ios --sdk 5.5.0.v20160831100821 --log-level trace --project-dir /Users/xxxx/Documents/Appcelerator_Studio_Workspace/appname --deploy-type production --distribution-name xxxx (xxxx) --ios-version 10.0 --keychain --pp-uuid xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx --target dist-adhoc --output-dir /Users/xxxx/Desktop --no-colors --no-progress-bars --no-prompt --no-banner --prompt-type socket-bundle --prompt-port 62057 --config-file /var/folders/v0/g4qtcvh14k35nphklnq8_gpw0000gn/T/build-1472983716606.json --no-banner --project-dir /Users/xxxx/Documents/Appcelerator_Studio_Workspace/appname {quote} The error: {quote} [ERROR] : Error details: Provisioning profile "xxxx" doesn't include signing certificate "iPhone Developer: xxxx (xxxx)". [ERROR] : Error details: Code signing is required for product type 'Application' in SDK 'iOS 10.0' {quote} The customer does adhoc-builds since years and tried it with another titanium-app as well, it's the same error. I will also try to reproduce it with my testing app. My guess it that we may have overseen the adhoc/dist builds when fixing the automatic code-signing in Xcode 8.