iPhone or iPad imap-mail.outlook.com error Cannot verify server identity ( How to Fix )

iPhone or iPad imap-mail.outlook.com error Cannot verify server identity connection errors in Mail are the perfect example of these issues. Fortunately, there's a fix for them. If you're plagued with any of these messages, here are some steps that can help you troubleshoot and resolve the problem in no time!

Solve 1: Install the latest version of iOS or iPadOS

Launch the Settings app on your iPhone or iPad.
Tap General.
Choose Software Update and follow the directions on the screen.

Solve 2: Force quit Mail and restart your device

On iPhones and iPads with Face ID, open the app switcher by swiping up from the bottom of the screen and pausing until the app switcher appears. Otherwise, double-click the home button.
Touch and hold the Mail app, then swipe up on the Mail app so that it leaves the screen.

Solve 3: Restart your iPhone or iPad:

On iPhone X or later, press and hold either volume button and the side button until the power off slider appears. On the iPhone SE (2020), 8, 7, or 6, press and hold the side button until the power off slider appears. On other iPhones, press and hold the top button until the power off slider appears. To restart an iPad that has Face ID, press and hold either volume button and the top button until the power off slider appears. To restart an iPad that has a Home button, press and hold the top button until the power off slider appears.
Swipe to power off.
Restart by holding down the on/off button until the Apple logo appears.

Solve 4: Delete and re-add the problem account

If you're having problems with one of the common email accounts that iOS can configure itself (e.g., iCloud, Google, Yahoo), your best solution may be to delete the account and re-add it. The email provider may have made some changes behind the scenes that aren't reflected in your account. Deleting the account and re-adding it will make the account settings current.

Choose Settings.
Scroll down, tap on Mail.
Tap on Accounts.

Select the email account that is having trouble connecting.
Tap Delete Account.
Tap Delete from My iPhone.

Solve 5: Manually configure your account

Every once in a while, your iOS device may lose track of an email account password, perhaps after restoring data and settings from a backup. In most cases, you should be prompted to reenter the password for the mail account. Except for some optional password fields for mail servers that send mail, recent updates to iOS have removed the ability to enter email passwords and other settings for standard email accounts (that is, those in the list of standard accounts, such as iCloud, Google, Yahoo, etc.)

But if you set up an email account using some "Other" service with a custom domain, take a look at the account settings and make sure no password fields are blank. If they are, plug in your password. You'll also need to do this any time you change the password for the account.