License & Subscription Issues

Fix Microsoft E5 Setup Error: Phone Number Did Not Pass Security Checks

WPS Content Manager Oct 9, 2026 869 views

Question details

The user cannot complete the Microsoft 365 E5 subscription or Developer Program setup because the provided phone number is rejected by the security verification system.

Fix Microsoft E5 Setup Error: Phone Number Did Not Pass Security Checks

Product: Microsoft 365 E5 Subscription
Device & OS: not provided
Scenario: Registering a new account for Microsoft 365 Developer Program or an E5 business subscription.
Observed behavior: The setup process fails and halts with the message 'Your phone number did not pass security checks.' Entering multiple different phone numbers yields the exact same error.

Before you start

Ensure you are using a standard cellular or landline number rather than a VOIP service, and temporarily turn off any active VPNs, as Microsoft's security filters frequently flag datacenter IP addresses.

Solution 1Recommended

Troubleshoot Browser, Network, and VPN Settings

Clear local network and browser caches that might be triggering Microsoft's security blocks, and ensure your connection appears authentic.

Often, Microsoft's automated security systems flag certain network conditions, such as VPN usage or corrupted browser cache, rather than the phone number itself. Resetting these parameters can bypass the security check block.

Disable VPN and Proxy Services

Turn off any active Virtual Private Network (VPN) or proxy extensions. Microsoft often blocks phone verification attempts coming from non-residential or masked IP addresses.

Use Incognito Mode or a Different Browser

Open a new Incognito or InPrivate browsing window (Ctrl+Shift+N or Cmd+Shift+N) to ensure no conflicting cookies or extensions interfere with the setup process.

Switch Your Network Connection

If you are on a corporate Wi-Fi or public network, disconnect and connect via a mobile hotspot using cellular data to rule out local network IP blacklisting.

Re-enter the Phone Number

Navigate back to the Microsoft E5 setup page and carefully enter a standard, non-VOIP mobile number.

Troubleshoot Browser, Network, and VPN Settings

Avoid Successive Attempts: Do not attempt to enter different phone numbers rapidly in a row. Too many failed attempts can cause Microsoft to temporarily lock your session. Wait a few hours before trying again.

Solution 2

Submit a Request via Microsoft Business Support

If standard troubleshooting fails, escalate the issue directly to Microsoft Support to bypass the automated block.

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Frequently Asked Questions

Why does Microsoft reject my phone number during the E5 setup?

Microsoft's security algorithms might reject a number if it is associated with a VOIP service (like Google Voice or Skype), if your IP address is masked by a VPN, or if the number has been used recently on multiple Microsoft accounts.

Can I bypass the phone verification step for the Microsoft Developer Program?

No, phone verification is a mandatory security step for creating a Microsoft 365 E5 subscription or joining the Developer Program to prevent automated bot registrations.

How long should I wait if my account gets temporarily blocked due to failed attempts?

If you receive a message about too many attempts, or if different numbers continually fail, it is highly recommended to wait at least 24 hours before trying again to allow the security system to reset.

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