When using System Center Virtual Machine Manager 2008 (SCVMM 2008) you receive the following error when attempting a P2V Conversion.

There is already an SSL certificate associated with port 443 on machine xxx.xx.com.

Firstly ensure that no application on machine xxx.xxx.com listens for HTTP traffic on TCP port 443 during the conversion. Alternatively use registry key HKLM\Software\Microsoft\Microsoft System Center Virtual Machine Manager Server\Settings\P2VBITSTcpPort on the VMM server to change the P2V transfer port number and add the necessary firewall rule for TCP port 443 on machine xxx.xxx.com.

ID: 13252

The likely problem is that there is something on the host that is using port 443. You can easily get around this by changing the port to communicate with the host. Here are the steps to solve error message “There is already an SSL certificate associated with port 443 on machine xxx.xxx.com”.

1. Go to Regedit;

2. Navigate to HKLM\Software\Microsoft\Microsoft System Center Virtual Machine Manager Server\Settings

3. Create a new DWORD reg entry named “P2VBITSTcpPort” and give it a decimal value of a different port. Try 445 or any other port that is not being used on the host machine.

4. Go to the system services (services.msc) and restart both the Virtual Machine Manager service and the BITS service.

5. Try again, it should not work and the “There is already an SSL certificate associated with port 443 on machine xxx.xxx.com” error is gone.

If you’d like to learn more about Microsoft Hyper-V, I’d recommend that you get hold of this Hyper-V Training.