Error Code: 399287 Request Id: ebb50bc8-3dbf-4fa0-ba28-6e5b935a1800 Correlation Id: 652ccba1-f03f-6000-00b4-8d754e782e12 Timestamp: 2025-10-01T16:27:50Z

Question

I lost my phone, which had Microsoft Authenticator on it, and then I lost access to my account. When I tried to send a message to my phone number, it showed error 399287.

Answer 1

Hi T Ryan,

That sounds inconvenient, especially when you're locked out of your account and need access fast. Let’s get you back in with the best recovery options available.

Error code 399287 happens when Microsoft blocks SMS or phone call verification because your phone number has been flagged by their internal system for having a “bad reputation.” This usually means the number was previously linked to suspicious or spam-like activity, even if not by you. As a result, Microsoft prevents it from being used for multi-factor authentication to protect your account.

To resolve Microsoft error code 399287, start by checking if you're still signed in on any trusted device like a PC, tablet, or Xbox. If so, go to https://aka.ms/mysecurityinfo and add a new sign-in method such as a different phone number, email, or the Microsoft Authenticator app. If you're completely locked out, use the account recovery form at https://account.live.com/acsr, and provide as much accurate information as possible to verify your identity. Once you regain access, visit https://mysignins.microsoft.com/security-info to set up new multi-factor authentication options. Avoid reusing the flagged phone number, as it may continue to be blocked. If the recovery fails, contact Microsoft support using their global phone numbers for further assistance.

Once you've tried these steps, feel free to let me know how things are going on your end. I’d love to hear if any of the solutions worked or if you need help with the next step, we’ll get through this together.