Previously i asked a question on this and microsoft gives me answer that open the ports of 5985/5986 , i have done this , even i allowed all traffic , but the issue not resolved , even you can see the security group rules of my appliance and migration vm

Hello SHAILENDRA PRASAD SHUKLA,

If the Azure Migrate appliance is failing validation even though ports 5985/5986 are open on the VM side, here are the most common causes:

The appliance communicates with Windows servers over WinRM port 5986 (HTTPS) by default. If the HTTPS prerequisites aren't configured on the target servers, the appliance communication will fall back to WinRM port 5985 (HTTP). To enforce HTTPS communication without fallback, enable the HTTPS protocol toggle in the Appliance Config Manager.

Refer: https://learn.microsoft.com/en-us/azure/migrate/migrate-appliance?view=migrate-classic#discovery-and-collection-process

After enabling the checkbox, ensure that the prerequisites are configured on the target servers:

1. If certificates aren't configured on the target servers, discovery will fail on the currently discovered servers and on newly added servers.
2. WinRM HTTPS requires a local computer Server Authentication certificate with a CN matching the hostname to be installed. The certificate must not be expired, revoked, or self-signed. Refer to the article on configuring WinRM for HTTPS for more information.

https://learn.microsoft.com/en-us/troubleshoot/windows-client/system-management-components/configure-winrm-for-https#more-information

• To confirm WinRM is listening on HTTPS, type the following command:

    winrm enumerate winrm/config/listener
    
  

• To confirm a computer certificate has been installed, use the Certificates MMC add-in or type the following command:

    winrm get http://schemas.microsoft.com/wbem/wsman/1/config
    
  

• If you get the following error message: Error number: -2144108267 0x80338115 ProviderFault WSManFault Message = Cannot create a WinRM listener on HTTPS because this machine does not have an appropriate certificate.

To be used for SSL, a certificate must have a CN matching the hostname, be appropriate for Server Authentication, and not be expired, revoked, or self-signed.

Open the certificates MMC add-in and confirm the following attributes are correct:

• The date of the computer falls between the Valid from: to the To: date on the General tab.
• Host name matches the Issued to: on the General tab, or it matches one of the Subject Alternative Name exactly as displayed on the Details tab.
• That the Enhanced Key Usage on the Details tab contains Server authentication.
• On the Certification Path tab that the Current Status is This certificate is OK.
• If you have more than one local computer account server certificate installed, confirm the Certificate Thumbprint displayed by Winrm enumerate winrm/config/listener is the same Thumbprint on the Details tab of the certificate.

Steps to Troubleshoot:

1. Check WinRM is Properly Configured on the VM, Run this command on the target VM:

winrm quickconfig

If it says WinRM is not configured, it will prompt to enable it — say yes. Also check:

 winrm e winrm/config/listener

Ensure there's a listener on port 5985 (HTTP) or 5986 (HTTPS).

2. Verify WinRM Service is Running. It should be in a Running state.

Get-Service winrm

3. From the Azure Migrate appliance, Test Connectivity from the Appliance to the VM. 

Test-NetConnection <VM-IP-or-hostname> -Port 5985

(or 5986 if you're using HTTPS). This confirms network reachability.

4. Check Firewall Rules on the VM, make sure inbound firewall rules allow traffic on:

 TCP 5985 (for HTTP WinRM)

 TCP 5986 (for HTTPS WinRM)

 Use:

New-NetFirewallRule -Name "WinRM HTTP" -DisplayName "WinRM over HTTP" -Protocol TCP -LocalPort 5985 -Action Allow

(or replace with 5986 and HTTPS if needed)

If the issue still persists, check the Azure Migrate appliance logs for more detailed error messages. The logs are typically located under C:\ProgramData\Microsoft Azure\Logs and may provide additional clues.

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Thanks