Installing the CA Certificate
To install the CA certificate
Start Internet Explorer and browse to Microsoft Certificate Services, for example: http://MyCA/certsrv.

Select Check on a pending certificate.

Click Start, and then click Run.

Type mmc, and then click OK.

On the Console menu, click Add/Remove Snap-in.

Click Add.

Click Certificates and then click Add.

Click Computer account and then click Next.

Ensure that Local computer:(the server computer) is selected and click Finish.

Click Close.

In the left pane tree view, expand Certificates (Local Computer), expand Personal, and then select Certificates.

Verify that there is exactly one certificate with the fully qualified domain name that you specified. You can double-click to view details.

Distribute the public key for the certificate to users who might want to access the Visual SourceSafe database using a secure connection, for example, users of the SourceSafe Internet plug-in for Visual Studio. You can either use e-mail or copy the key from your computer to a user over the network.

Попробуйте вот так.