MFA & Verification Issues

How to Fix Microsoft 365 Business Account Setup and Phone Verification Errors

Maira Mehtab Sep 22, 2026 871 views

Question details

The user is unable to create a work account for a newly purchased Microsoft 365 Business Standard subscription due to a failure during the phone verification process.

Product: Microsoft 365 Business Standard
Device & OS: Mac and iOS
Scenario: Setting up a new Microsoft 365 Business account purchased through a reseller and attempting to complete the mandatory phone verification.
Observed behavior: The account setup fails at the phone verification step with an error message stating that Microsoft needs more information.

Before you start

Ensure you have a stable internet connection and access to an alternative smartphone or a different mobile phone number before attempting the setup process again.

Solution 1Recommended

Complete the Account Setup Using a Smartphone

Switching to a mobile device like an iPhone bypasses browser-specific verification glitches often encountered on desktop computers.

Many users experience phone verification failures when using desktop browsers such as Safari on a Mac. Transitioning the setup process to a smartphone often resolves these unexpected Microsoft verification blocks.

Open setup link on mobile

Send the Microsoft 365 Business Standard account setup link provided by your reseller to your smartphone (e.g., via email or messaging app).

Access the link

Tap the link on your smartphone to open the Microsoft account creation page in your mobile browser.

Enter account details

Fill in your desired work account details and proceed to the phone verification step.

Verify your phone number

Enter your mobile number to receive the verification text or call, and input the code to successfully complete the account setup.

Proven Workaround: This method has successfully resolved the issue for multiple users who were blocked while using desktop browsers.

Solution 2

Use an InPrivate or Incognito Browser Window

Using a private browsing window prevents cached data and extensions from interfering with Microsoft's verification scripts.

Solution 3

Wait and Contact Support

If automated verification is temporarily locked, waiting for the system to reset is required before contacting support.

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Frequently Asked Questions

Why does Microsoft 365 require phone verification for business accounts?

Microsoft requires phone verification to prevent automated bot registrations and ensure that a real person is creating the business account. It acts as an initial layer of security and is often tied to Multi-Factor Authentication (MFA).

Can I use a VoIP number to verify my Microsoft 365 account?

Generally, Microsoft's security systems block VoIP (Voice over IP) numbers or virtual numbers during the initial account setup to prevent spam. You must use a standard mobile phone number provided by a legitimate cellular carrier.

What does 'Microsoft needs more information' mean during setup?

This error message typically means that Microsoft's automated fraud prevention system has flagged your registration attempt. It can happen due to browser cache issues, IP address flags, or using a phone number that has been used too many times recently.

How long does a Microsoft phone verification block last?

If you are blocked due to too many failed attempts, Microsoft recommends waiting 24 to 48 hours before trying again. Attempting to verify within this cooldown period will only reset the block timer.

Login & Account Issues