ERR_CERT_AUTHORITY_INVALID

[MM76]

Hi I have a recurring problem that happens every few months.  Not a major problem given infrequent but is very annoying.  I have Orbi RBR850s with latest firmware; Nighthawk 1G modem

• Internet will be working fine
• All of a sudden I will get Microsoft Security Alerts from outlook.office.com on my laptop about certificate errors; at this point the internet is working normal for other devices; 
  • I dont know if just coincidence but I always am alerted to problem first on my laptop with the Microsoft Security Alerts; it is never other devices that stop working first
• Then everything gets crazy; apps on phones will not work properly (wont fully load info) and soon no devices (eg, smart speakers, TVs) have connectivity
• I get the infamous Connection is not private message on multiple computers with ERR-CERT_AUTHORITY_INVALID
• The orbi router will look normal (no error colors), although after I restart the modem and routers and try to get working, Orbi will be purple for the first couple of tries

And basically I restart my modem and routers a few times (1 restart has not sufficed) and eventually everything just starts working again after ~30 minutes. I could be wrong but it seems like a certain amount of time needs to go by before everything is back to normal.

Everything looks normal from the ISP side during the whole situation

I have had this happen in 2 different houses with 2 different modems.  the common thing has been my Orbi RBR850s

I thought maybe my laptop was triggering this because I always see the issue there first but that's a total guess.

Anyone have any ideas?

Thanks for reading

[FURRYe38]

What Firmware version is currently loaded?
What is the model# of the Internet Service Providers modem/ONT the NG router is connected too?

You'll need to check with MS on help and support of Outlook and there app. 

Does this happen with different browsers? 

[CrimpOn]

Thanks for posting the screen shot.  The next time it happens, could you select the Advanced option in the lower part of the screen and copy what comes up? I have a suspicion that Chrome is not actually complaining about cnn.com.

Thanks.

[MM76]

The Orbi (RBK852) is currently connected to Netgear CM2050V (with firmware V2.01.03).

In the past I had it connected to Netgear CM1200 and had same issue come up a few times (but during first 12 months of same setup, it never happened).

The Orbi is on firmware V4.6.9.11_2.3.5 currently 

RE: MS, my company's IT dept (it is company laptop) suggested updating drivers and BIOS on laptop which did have needed updates but I dont think those have been out of date the past year, so I am not sure that really explains it

[MM76]

Yep definitely, will do!

[MM76]

And forgot to add.  Once i notice the problem and test other computers, i have the same private screen problem on them too, regardless of the browser type