If you create a new email account, or change the password for an existing one, then you will likely wish to update this information on your iPhone. But if you go to the Mail, Contacts, Calendars menu on your device, you may find that all of the email account options are grayed out, which is preventing you from accessing them. This is occurring because Restrictions have been enabled on the iPhone.
Fortunately you can modify the settings on the Restrictions menu if you have the passcode. This will permit you to adjust the email account lock so that you can add, delete or modify the email accounts on your iPhone as needed.
Allow Email Accounts to Be Edited, Added, or Deleted on an iPhone
The steps in this article were written using an iPhone 6 Plus, in iOS 8.4. These steps will also work for other devices using iOS 8 or higher. You can also edit the Restrictions settings on iPhone models running versions of iOS lower than 8.0, but the screens and exact steps in those versions of the operating system may be slightly different than those shown here.
Note that you will need to know the Restrictions passcode in order to make the changes outlined below. If you do not know this passcode, then you will need to contact the person that set it.
Step 1: Open the Settings menu.
Step 2: Select the General option.
Step 3: Scroll down and select the Restrictions option.
Step 4: Enter the Restrictions passcode.
Step 5: Scroll down and select the Accounts option under the Allow Changes section.
Step 6: Select the Allow Changes option.
You will now be able to open the Mail, Contacts, Calendars menu and add, delete, or modify your email accounts. For example, this guide will show you how to change the password on an iPhone email account if you had previously changed it with your email provider.
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