Smart Lock not working, is it due to Outlook?

I have a Nexus 6 with Android 5.1, kernel version 3.10.40-geec2459, build number LMY47D. When I first started using the Nexus 6, Smart Lock worked. After a while it stopped working. If I open the *Smart Lock* setting under *Security*, all options (like *Trusted devices* and *Trusted places*) are *Disabled by administrator* Possible suspects: I use gmail with exchange, I use *Android Device Manager* and I use Outlook for Android. Is anyone of those apps supposed to stop Smart Lock? On the Office Blog it states > Further, a device level PIN means we can take advantage of features like native device encryption, TouchID on iOS and Smart Lock on Android I am not sure of how to interpret this. Does it mean that they "take advantage" of "Smart Lock" by disabling it? I tested disabing *Android Device Manager* and *Outlook Device Policy* under the *Device administrators* and then rebooted the phone. That did not help. I would really like to use both Outlook and Smart lock. Is it possible? Would it help to root the phone?