What you’re seeing
- A Windows Security or Microsoft sign-in window pops up again and again, even after the correct password is entered.
- Outlook's status bar shows "Need Password" or "Disconnected".
- Mail stops syncing until the prompt is answered, then the prompt returns a few minutes later.
- Outlook on the web and the phone app work fine with the same account.
Common causes
Every environment is different, but these are the causes our engineers find most often:
- Credentials saved by Windows for the mailbox are stale, often after a password change.
- Outlook is attempting basic or legacy authentication, which Microsoft 365 no longer accepts.
- The Windows component that brokers Microsoft 365 sign-ins for Office apps is damaged or has been disabled.
- A Conditional Access or MFA requirement can't be satisfied by the Outlook build in use, so each attempt is rejected.
- Autodiscover still points to an old Exchange server or previous email host, so Outlook keeps signing in to the wrong place.
- Office is signed in with a different account than the mailbox owner, and the two identities conflict.
Why it matters
Repeated password prompts interrupt work all day and stop mail from syncing, so people miss messages and meeting changes without realizing it. Worse, users learn to type their password into any box that appears, which makes them easy targets for phishing pages that mimic the Microsoft sign-in. If the cause is an outdated authentication method or misdirected Autodiscover, it tends to spread to other users as their cached credentials expire.
How AskTechGurus fixes it
Skip the trial and error. A certified engineer works on your actual system, finds the root cause, and fixes it properly.
Tell us what’s happening
Submit a ticket in about two minutes. Paste the error, describe what changed, and pick your tier. No charge to submit.
A certified engineer diagnoses it
A vetted, US-based systems engineer claims your ticket, usually within minutes during business hours, and investigates over a secure remote session you can watch and end at any time.
Fixed and verified with you
The engineer resolves the root cause and confirms with you that it’s working. You don’t just get a workaround, and you get a plain-English summary of what was wrong.
Pay only when it’s resolved
Fixed price from $99, invoiced only after you approve the fix. If it isn’t resolved, you don’t pay.
Frequently asked questions
Does constant prompting mean my account has been hacked?
Usually not; it's typically a configuration or authentication problem on the computer. It's still worth reviewing recent sign-in activity, which the engineer can do while investigating.
Will I lose email if my Outlook profile has to be rebuilt?
Not for Microsoft 365 mailboxes, which keep everything on Microsoft's servers. Local data such as PST archives is identified and preserved before anything is changed.