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However, we have found that removing your OTC email account from your device and then re-adding it to your device will sometimes get your email working again in your device's built-in application. Instructions for how to do this vary varies greatly depending on your version of Android or iOS, but you can drop by your phone's carrier store for assistance. OTC does not provide support for the built-in app.

Known issue: There is a known problem with passwords updating when you have the Microsoft Authenticator App on your mobile device and you are using other Office 356 apps (e.g. Outlook, Teams) with the same account on that device. If you change your OTC password and you have already authenticated your account that day using the Microsoft Authenticator App, your new password may not be able to update on your other Microsoft mobile apps until the next authentication cycle (up to 24 hours). The best solution, in this case, is to remove your OTC email account from your device , and then re-add it.

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