how to add multiuser on ASUS ZENPAD 10

Hi ,
I'm not an android user, and I need a big help!

My company has bought some asus zenpad 10 and need that this tablet can be used by multiple users.

I discover that the new operating system "Android 5.0.2" hasn't this function. Surfing on the web I discover that I can root the tablet and I can change some settings.
So, I rooted the tablet but I have not understand how to change this settings, and how to do this.

There's someone that can help me? As I told, I'm a beginner on android system and I need help step by step.

Thank's a lot.


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