Certificate Error when Adding a XenServer to Virtual Machine Manager

Every once-in-a-while, when you try to add a XenServer host to the System Center Virtual Machine Manager console, it will generate a certificate error, and the XenServer host will not be added to Virtual Machine Manager:
If you are experiencing this issue when you try to add a XenServer host to System Center Virtual Machine Manager, here is the procedure you can follow to import the XenServer certificate to the the SCVMM server so that you can add the XenServer host to your System Center Virtual Machine Manager console.

1.

Open WinSCP and connect to your XenServer via SFTP using your root login:

2.

Go up one directory level by clicking on the top folder in the pane on the right-hand side:

3.

Then go to the etc folder:

4.

Then go to the xensource folder:

5.

Copy the xapi-ssl.cer file from the XenServer to you SCVMM server:

6.

On your SCVMM server, rename the xapi-ssl.cer file to the FQDN of your XenServer (e.g. server.domain.local.cer)

7.

Click on the Start menu, then click on Run (or hit the Windows Key + R), and type mmc in the Run dialog box and hit OK:

8.

Click on File >  Add/Remove Snap-in... (or hit Ctrl + M):

9.

Click on Certificates, then click Add >:

10.

Select Computer account, then click Next:

11.

Select Local computer, then click Finish:

12.

Click OK:

13.

Expand Certificates (Local Computer) >  Trusted People:

14.

Right-click on Certificates and select All Tasks >  Import:

15.

Click Next:

16.

Click Browse:

17.

Select the server.domain.local.cer file you copied to your SCVMM server, then click Open:

18.

Click Next:

19.

Select Place all certificates in the following store, and choose Trusted People as the Certificate store, then click Next:

20.

Click Finish:

21.

Click OK:
Once the certificate has been successfully imported to your SCVMM server, you should be able to add your XenServer host to the System Center Virtual Machine Manager console without any problem.