Hi Hvnly,
Welcome to Microsoft Q&A.
From your description (the phone/SMS option showing only your email with no field to enter a number or code), this usually happens when the Microsoft sign-in/verification page doesn’t fully render in the embedded sign-in window, or when cached sign-in tokens/credentials get “stuck.”
1) Verify in a full browser first (quick isolation test)
- In Safari or Chrome, open a Private/Incognito window. Go to account.microsoft.com/security and try SMS verification again.
- If this works in Private/another browser, the issue is often tied to blocked cookies/content blockers or a corrupted session.
For reference: Troubleshoot Microsoft verification code issues
2) Outlook for Mac: reset the sign-in state
If you’re not sure whether you’re using New Outlook: in Outlook, check View > New Outlook (toggle). The steps differ slightly.
- Classic Outlook: Outlook > Tools > Accounts > select account > … > Reset Account
- New Outlook: Outlook Settings > Accounts > remove the account, restart Outlook, then add it back.
3) If the embedded sign-in window still loops: clear saved Office sign-in items (Keychain)
- Quit all Office apps.
- Open Keychain Access and search: Microsoft, Office, Outlook, OneAuth/ADAL.
- Remove entries clearly tied to Office/Microsoft sign-in, then restart Outlook and sign in again.
(Expect to be signed out and asked to sign back in.)
4) Optional: switch from SMS to Microsoft Authenticator (more reliable)
Authenticator uses approval prompts (push) instead of SMS and can avoid SMS-code screens during sign-in: Microsoft Authenticator FAQs
Quick question: does the “blank/no code box” happen in Safari/Chrome too, or only inside Outlook’s sign-in window? That should tell us whether to focus on browser/privacy settings or cached Outlook/Office credentials.
Please let me know if this proves useful to you or if you would like further assistance.
I'm looking forward to your answer.
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