Cannot verify server identity
a few hours during the day a pop up comes up on my phone saying cannot verify server identity it comes up about 3 times a day I’ve tried everything to stop but it’s still showing up
iPhone 16 Pro Max, iOS 18
Question marked as
Your may have a subscribed Calendar or a CalDAV or a CardDAV/LDAP account for Contacts or Calendars.
What happens when you click the "Details" on the error popup message (See the Pic below)
The best would be to Delete and Add the email account that is creating the issue.
You may also try changing SSL settings
Settings > Password & Accounts > [Select the Mail account} > [Tape on Account with the email ID} > Advanced > SSL Settings > [Disable]
Click <Account (in Blue)
Click on DONE (in Blue) when exiting in the previous screen
Probably you may have accepted an offer or subscribed for a spam Calendar accidentally. Watch the GIF below to know how to unsubscribe from these calendars. Look for an unknown Calendar on the device under subscribed calendars.