1. Download and install Windows SDK
2. Open command prompt as Administrator and cd to this directory: C:\Program Files\Microsoft SDKs\Windows\v7.0\Bin
2. Create a root certificate
makecert -pe -n "CN=Test Root Authority" -ss my -sr LocalMachine -a sha1 -sky signature -r "c:\Test Root Authority.cer"
3. Create the new certificate and sign it with the newly generated self-signed root certificate
makecert -pe -n "CN=yourdomain.com" -ss my -sr LocalMachine -a sha1 -sky exchange -eku 1.3.6.1.5.5.7.3.1 -in "Test Root Authority" -is my -ir LocalMachine -sp "Microsoft RSA Schannel Cryptographic Provider" -sy 12 c:\yourdomain.cer