Android 6.0 Do-not-Disturb: how to go to vibrate only in certain hours? I'm trying to familarize myself with my newest Nexus 6p, which runs Android 6.0.1 now.

Do I understand correctly, that currently Do-not-Disturb cannot manipulate calls and notifications volume so that I could set it to go to "Vibrate only" during hours I am in the office?

If not, what is the appropriate method to achieve this? External app only?

ADDED 13.05.2016
I solved the problem via Tasker.
You are right. Do-not-Disturb cannot manipulate calls and notifications volume. 

I think the only way to go to "vibrate only" is to hold volume down key all the way down. But you also need to turn the volume up manually.