This article details how to delete and re-setup your Barry email account on your iOS device.
*** Your iOS device must be running iOS version 11.x or higher, to support "modern" authentication protocols. iOS 10.x or lower is not supported.
Delete your existing Barry email account on your iOS device:
You can remove an email account from the Mail app and from all the apps that use it on your iOS device.
Note: This action doesn’t cancel the email account; it just removes it from your iOS device. To close the account completely, visit your email account provider.
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Go to Settings 
> Mail.
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Tap Accounts, tap on your Barry email account you want to remove from your device, then tap Sign Out or Delete Account.
Note: If you change your mind later, you can add the Barry email account back to your device.
Setup your Barry email on your iOS device:
You can add your Barry email account (and other accounts) to the Mail app so that you can receive all your email in one place and easily send email from any of your accounts.
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Go to Settings > Mail.
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Tap Add Account...
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Tap the email service Microsoft Exchange — then enter your email account information
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Type in your email address, and a description for the account (ex: Barry Email).
- You need to type your full email address in the Email field.
- Faculty/Staff: username@barry.edu (for example: jdoe@barry.edu)
- Students: firstname.lastname@mymail.barry.edu (for example: john.doe@mymail.barry.edu or john.doe@law.barry.edu)
5. Tap NEXT on the upper-right corner of the screen.
6. Choose Sign In
7. A Microsoft screen will be shown, asking if you are trying to sign in to Apple Internet Accounts, tap Continue.
8. A Barry login page will be shown, enter your email address and password, then tap Sign In.
9. A screen will be shown indicating which items you want to sync (Mail, Contacts, Calendar, etc), select/deselect the ones you want, then tap Save.
Now you will see your account listing showing your new account (and any other accounts you have setup). The default sync setting for mail is 1 month, if you want to change that, tap your newly created account in the list, then change the Mail Days to Sync option as needed. Close the Settings app and launch the Mail app to access your email.