To update the password within your iPhone for email, please follow these instructions.
1. Locate and select the Settings app on the iPhone.
2. Scroll down until you find Passwords & Accounts. Select this option.
3. Select the account under Accounts that should be labeled either Exchange or “Company Name”.
4. Next to the word Account will be your work email address. Touch the arrow next to your address.
5. In the line that is labeled Password, enter your new password here. When you are done, select done.