How to make outlook work on my phone

Dear @Account Security,

Thank you for posting your question in the Microsoft Q&A forum.   

Before giving you the best solution, could you please confirm these questions below to help me diagnose the issue more effectively.  

• Does your account use a personal account (@outlook.com/@hotmail.com email), or is it a work/school account (e.g., @company.com)?     
• If you are using business account, are you the admin in your company? If yes, are you the only admin or there are other admins in your company? Is your iPhone managed by your company through Intune/Company Portal, or is it a personal device without Company Portal installed?
• Can you sign-in to the affected account in other applications?   
• Do you currently have Microsoft Authenticator installed and working on this phone?
• When you try to sign in to Outlook, what exact error message do you see?
• Did you previously use this same work account on another phone, and was MFA reset after Apple replaced the software?
• Can you sign in to your account on another device (like a laptop or tablet)? Or on this iPhone, can you sign in to any other Microsoft account using the Outlook app?

In the meantime, here are some steps I recommend you try:

Step 1: Update iOS & Outlook versions

• Update iOS (Settings > General > Software Update).

Update Outlook and Microsoft Authenticator in the App Store.

Step 2: Disable VPN / content filters temporarily

If you use a VPN, ad‑blocker, or private DNS, turn it off while you sign in. These can block device compliance checks and modern auth

Step 3: Sign out & remove old accounts

Outlook > Tap your avatar > Settings > Accounts > Remove account.

Step 4: Uninstall and reinstall the Outlook app

Install Microsoft Outlook from the App Store > Open Outlook > Add Account > enter your email.

Step 5: Clear cache and restart the phone

Then, to set up Office apps and email on a mobile device, please follow the Microsoft instruction here: Set up Office apps and email on a mobile device

I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this. If I misunderstand anything, please feel free to reach out.

Please understand that our initial response does not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.

Thank you for your patience and your understanding. If you have any questions, please feel free to reach out.

I'm looking forward for your reply.

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