How do I change my email password in iOS 10?

It's not the ideal solution as it's a bit of a flaw in the new IOS but you have to delete your account then add a new account, so make sure if you have wifi especially if you have lots of emails.

Delete the yahoo account then go back and add it back in.

I believe this is what's happening now (though can't find any confirmation from Apple):

In the past, you would enter your password and the iPhone would store is locally in some kind of reversibly encrypted form. When it needed to access your email it would un-encrypt your password and send it to the server. Storing your password is a security hole.

What probably happens now is that when you first create your account (or when you first upgrade to the new client), the iphone does not store your password but sends it directly to Yahoo and gets back what's called a token (actually probably two - an access token and a refresh token but that's a different discussion).

The iPhone stores this token which is only usable by it and when it accesses Yahoo it sends this token in place of a password. When you change your password on Yahoo, the iPhone doesn't care because Yahoo 'knows' the iPhone had the right password when it first got its token, so the iPhone continues to work. If you no longer want your iPhone to be able to access your Yahoo account, go to your Yahoo account and delete the entry for the iPhone.

One issue is that Yahoo help claims you can delete apps under the Account Security menu but you actually have to go to Recent Activity, as another user posted. Also, instead of using the name of your iphone it just calls the app 'iOS' which will be confusing if you have multiple Apple devices connected.

This is what I did. I changed the password of my mail.yahoo account on the IE browser. To do so by clicking the account name at the up-right corner, select "Account Info", select "Account Security" / Change Password. My iPhone with iOS 10.0.2 could still access my yahoo email after password change. But, to feel safe, you can force it to re-enter the new password. With "Account Info" page in IE browser, select "Recent Activity". Under "Apps connected to your account", click "Remove" beside the "iOS" item(s). Now, refresh emails in your iPhone/iPad. It will take you to re-enter the password.

My password is being used by my friend.. i am afraid that soon he will hack my account.. i am using apple device, ipad mini 3, i dont know how to change my password coz when i registered before i just signed up to create new account and i used my gmail username but different in password.. so im a bit crazy now.. i cant change my pass.. help me pls... thx.. currently, i am IoS10

From what I gather from the other replies, you would log into your work email on a computer, navigate to account settings, and remove her iPad as an authorized device on your account. One you remove the device, she will no longer have access to your email.

Also, when the password updates between devices, there is not way for you to actually "see" the password, new or old. Remove the device and no more access.

Does he only "know" your password? If so, you can log into your account on a desktop and change your password.

If he knows your password and is accessing your email through any of his own devices or apps, you can log into your account on a desktop and remove any of his devices from having access to your email, and then change your password.

iOS 10 is horrible!!!!

The problem seems to be fixed after updating to IOS 10.2.

Your device udates your new password automatically

Once your password is changed in the email on the internet i.e. Yahoo.com, att.net, bellsouth.net or sbcglobal.net it will automatically update cellphone and tablets.

Nope. There are user name and password fields but they can't be accessed. In my case I'm getting a sever error every time I try to send attachments, but I never changed any settings!