Login issues

Hi @Sander Svendsen,

Thank you for reaching out. I’ll be glad to help you look into this. To better understand your situation and provide the most relevant guidance, could you please help clarify a few details for me?

• When you try to sign in through the Outlook app, do you see any specific error message or error code, or does the sign‑in fail without one? If possible, a screenshot of the error message or the behavior you’re seeing would be very helpful.
• Has this issue started recently, or has it always occurred when signing in through the app?
• Also, are other users in your organization experiencing the same problem, or does this seem to affect only your account?

Once I have a bit more information, I’ll be in a better position to understand what’s happening, look into it more thoroughly, and suggest the most appropriate next steps. If you have any updates or additional details to share, please feel free to leave a comment under this post. I’ll be more than happy to continue assisting you.

Thank you for your time, and I look forward to your reply.

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Try the following steps to troubleshoot sign-in issues with a business Outlook account when the browser works but the app does not:

1. Make sure the Outlook app is up to date. Install the latest version of Outlook for Android or iOS from the store. Updated security standards can cause recurring prompts or failures if the app is outdated.
2. Confirm the correct account type is used in the app (work or school / Microsoft 365 business) rather than personal Outlook.com.
3. If the app shows a specific error:
   • If you see repeated password prompts or cannot connect to the mailbox, sign in to the Office 365 support troubleshooter with the same business account at the page described in “Fix Outlook account problems in Office 365 for business.” It can automatically diagnose profile, license, or connection issues for that account.
   • If you see an “Access Denied” or similar login error in Outlook mobile, the account may be blocked from using Outlook for iOS/Android by policy. In that case, only the organization’s IT administrator can unblock the account.
4. If the account is a Microsoft 365 work or school account and the password might be wrong or expired, use the self-service password reset page (if allowed by the organization) as described in “Can’t sign in to the Outlook mobile app,” or contact the IT admin to reset or unlock the account.
5. If sign-in works in the browser but not in the app even after updating and verifying the password, contact the organization’s IT administrator with the exact error shown in the app so they can check account status, policies, and sign-in logs.

References:

• Can't sign in to the Outlook mobile app
• Access Denied: Login Error
• Fix Outlook account problems in Office 365 for business