Issues signing in to Outlook or other Microsoft 365 apps on mobile devices are typically related to account authentication or the specific sign-in method being used, not to a general outage on a particular device type.
For Outlook on mobile, the documented guidance is:
- If using a Microsoft personal account and sign-in fails or verification codes are not working, run the Microsoft sign-in helper tool. It checks the account and provides specific steps to resolve detected problems.
- Use the "Start" link under Microsoft personal account in the Outlook mobile sign-in article.
- If using a Microsoft 365 work or school account and sign-in fails (including MFA issues such as SMS not arriving or alternative methods not working), reset the password if self-service password reset is enabled for the tenant.
- Use the Reset password link under Work or school account used with Microsoft 365.
- If password reset is not allowed or still fails, contact the organization’s IT admin to review and adjust authentication methods.
- If using a non-Microsoft email account (for example, Gmail or Yahoo) in Outlook mobile and sign-in or verification fails, support must come from that email provider.
- If recurring password prompts or failures are seen, ensure the latest Outlook mobile app version is installed, as updated security standards can require newer app versions to authenticate successfully.
The provided context does not specify a known, open, device-specific bug for Amazon Fire tablets or a timeline for such an issue to be resolved. The supported and documented remediation paths are the sign-in helper for personal accounts, password reset or admin assistance for work/school accounts, and updating to the latest Outlook mobile app.
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