ChromeOS version: 64.0.3282.41 Beta, 63.0.3239.111 Stable 
ChromeOS device model: Pixelbook , Chromebook Flip C302 which has ARC.
Domain info and affected user info:
https://drive.google.com/open?id=1u6EhHkyosbzcmOh5FSl0CGMrw5TMDiO68wWi6BqK7Wc

Case#: 14601182

Description:"Certificate authority installed" pop-up appears each 5-20 minutes inside ARC.

Steps to reproduce: 
1. Sign-in to the device 
2. Enable Play Store 
3. Wait for a certificate notification to be displayed at the bottom right hand corner 
4. Close the notification 
5. Wait between 5 up to 20 minutes and the notification will show up again 
6. Close the notification 
7. The notification will show up again. 

- Timeframe when issue started: 
The issue started when they enabled ARC for their devices, while they are aware that the product is still in beta, they have seen that for other domains the notification can be closed and won't show again however the are getting in recurrently, even after using the same profile (not deleting it nor using Erase all local user data). 

- Does it affect all devices? 
Yes (All of the ones running ARC) 

- Isolated to: 
Currently happening in Stable and Beta and both the versions shared above and their recurrent updates. 


Current Behavior / Reproduction: 
Notification "Certificate authority installed" will show up again
Close the notification
The notification will show up again.

Expected Behavior:
Notification "Certificate authority installed" shows only once.

- Troubleshooting steps taken: 
-Attempted to disable the notification from Chrome OS without success. 
-Attempted to disable the notification from Android settings without success.
-Tested Other OS versions without success. 
-Tested locally by moving from Device management to Mobile management and didn't work 
-Tested pushing the Device policy app without success, issue is not reproducible in any scenario 
-Confirmed with a co-worker that his domain will display the notification even when the settings are the same, no certificate pushed in any of the Admin consoles, however his notification can be skipped and it won't happen again. 

- Is this reproducible in Beta/Dev? 
Yes 

- Existing Workaround: 
None, normally you can skip or close the notification and it won't show up again unless you recreate the profile or sign-in to a new device. For our customer this keeps happening. 

Drive link to logs: : The pop up appeared at 9:47am Feb 08.
https://drive.google.com/open?id=1IrsH_uhCXYbXTXY5y911rJm_ze5JUFLg


Screenshot of the Certificate authority installed message.
https://drive.google.com/open?id=1GUT8GpQkFWqPfzMt2xXKVhepdAqPmIfq

Screenshot of Network may be monitored.
https://drive.google.com/open?id=1B9P5MyTGuvCm5ob-YG83lY4FbCqufpqK

Screenshot of Network monitoring.
https://drive.google.com/open?id=1ezp8qmV_G69QakNyu1HeXfB0BXR7zUft

Screenshot of about device window.
https://drive.google.com/open?id=1oQoJ7NlJJ7X_b49C5Tqm5iS8V38X1FGE
 
Note,
Original case is b/72443753