changing organization to microsoft guest account I get: "Your account has been locked. Contact your support person to unlock it, then try again."

Hi @אוקרט שמואל דב ,

If you are attempting to access an organization as a guest user and receive the following error message: "Your account has been locked. Contact your support person to unlock it, then try again." I recommend first checking whether other guest users within the same organization are experiencing the same issue. If other guest users can access the organization successfully, the issue may be isolated to the affected guest account.

If you are not an administrator, please contact your organization's administrator and ask them to review the guest account. They can perform the following checks:

• Verify that the guest account is not blocked from signing in through the Microsoft 365 Admin Center > Active Users.
• Review any risky user detections in Microsoft Entra ID: Risky Users.
• They can try removing the affected guest account from Microsoft Entra ID and then sending a new guest invitation to recreate the guest user object
  • How to create, invite, and delete users in Microsoft Entra ID - Microsoft Entra | Microsoft Learn
  • Quickstart: Add a guest user and send an invitation - Microsoft Entra External ID | Microsoft Learn

If the issue persists after performing these steps, please let me know whether the problem affects only a single guest account or multiple guest accounts, and I will be happy to investigate further.