When your password changes at work this also effects your email on your mobile device. You will notice that your emails stop syncing. In order to update your password, please see the below steps:
1. Tap on the Email App
2. Tap on 'More'
3. Tap on 'Settings'
4. Tap on the email account that you need to update the password for
5. Scroll down to the bottom of the screen and Tap on 'Exchange Server Settings'
6. Tap on the password, remove the old password and enter in the updated password. Once completed tap 'done'.