Hi Connor Iwanicki,
Welcome to the Microsoft Q&A forum. I understand how frustrating it is when Outlook on iOS does not allow you to create or reply to emails, especially when the issue continues after reinstalling the app.
Based on the message shown, this situation is typically related to the authentication state of a personal Outlook.com account in the Outlook mobile app, rather than a mailbox or email‑sending setting.
Please note that this forum is a user‑to‑user support space, so there is no access to backend account systems, but the steps below help narrow whether the issue is device‑specific or account‑level.
1, Confirm the account type
Please confirm that the affected account is a personal Microsoft account (Outlook.com / Hotmail.com / Live.com) and not a work or school account. This message can appear when Outlook for iOS attempts to authenticate a personal account using the work/school sign‑in flow.
2, Remove the account completely from Outlook for iOS
In Outlook for iOS, go to Settings > Accounts, select the account, and remove it. After removing the account, restart the iPhone to clear any remaining sign‑in state.
3, Sign in again as a new account
Reopen Outlook for iOS and add the account again, ensuring you choose the option to sign in with a personal Microsoft account, not a work or school account.
4, Verify account access on the web
Sign in to https://outlook.com using the same account and confirm you can compose and reply to emails successfully there. This helps confirm the account itself is active and functional.
5, Contact Microsoft Support if the issue continues
If the same message still appears after these steps, it would be best to contact Microsoft Support directly so the account’s authentication state can be reviewed. Please follow below steps to reach a live chat agent:
- Visit the Microsoft Support contact page: Contact - Microsoft Support
- In the search bar provided on the page, type "Outlook issue" and press Enter.
- Click on the "Get Help" button that appears.
- Scroll down the page until you see and click on the "Contact Support" option.
- When prompted to select your product or service, choose "Other Products".
- For the category, choose "Outlook".
- Look for and click on "Chat with a support agent in your web browser".
- Confirm your personal email when prompted - this is the email Microsoft will use to communicate with you during and after the support session.
- Explain your situation clearly: Be concise but provide all the relevant details.
I hope this helps clarify the situation and points you toward the appropriate next step.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.