iPhone keeps getting "Cannot Verify Server Identity" pop ups

Apparently it’s an error with your Wi-Fi. You can restart your router and it should fix the issue. You can check by turning off the Wi-Fi on your phone to see if the problem goes away. If it does then you’ll know it’s your home Wi-Fi and restarting your router should fix it.

I spoke with my ISP and they are not using McAfee on our modem device, they also reset our service - this did not resolve the issue. I found a thread of others who have a different ISP and they're experiencing it too.

I've restarted my apple settings and am now speaking to my third Apple technician. Once I find what works, I'll reply again.

I also use Outlook, and do not have a McAfee account, my error states hotmail instead of outlook though and I do not have a Hotmail account.

This is a certificate error through Outlook, Microsoft has shared (search Microsoft Massive Outlook Outage) that it's impacted thousands of outlook users. I removed my Outlook account from my phone and the error stopped. Until it's resolved, I'm going to use Safari to access my email since that doesn't cause any issues.

I'll try to re-add my Outlook into my Mail app in a week or so and report back if the error message comes back.

I am also getting this error. It is annoying. I spoke to support,and they had me remove all my emails, re-install them, the error still persisted, had me remove only my exchange emails and it still persisted. They had me remove my server connection and it seem to slow down some, but it still persisted. I am out of ideas, and I am pretty frustrated on what could be causing this issue. It started about yesterday morning.

Its an easy fix if you call

apple. Its something with outlook. I had the same issue but mine was saying hotmail (i dont have hotmail). Lady found an error in my calendar with outlook. We deleted it and then added it back as other with imap/smtp and it stopped the message.