The VPN connection to a Windows server (using SSTP connection) results in errors 0x800b0101 and 0x80072746. Ex: 0x800b0101 - A required certificate is not within its validity period
The cause of the initial (bolded) error above is that the SSL certificate being used by Windows Server for SSTP has expired. The When using self-signed certificates generated using default system tools, they expire after only 1 year. The self-signed certificates can require some installation client-side as well. The second error message will appear after the certificate is updated on the server until the certificate is reloaded on the client.
- Associate a new certificate with the SSTP VPN on Windows Server
- Export the certificate to a .pfx file for distribution and remember the password for later use
- Re-import the certificate on the client
- In start menu, type MMC and click the Program that appears (“MMC”)
- File > Add/Remove Snap-in
- Select “Certificates” and click “Add”. A popup will appear. Choose “Computer account” on the first screen and “Local computer” on the second screen. Click Finish to close that window. Click OK to close the Snap-in window.
- Go to Console Root > Certificates > Trusted Root Certification Authorities > Certificates
- Delete the old certificate
- Right-click on that “Certificates” folder and click All Tasks > “Import”
- Select C:\path\to\MyCertificate.pfx
- Enter the pfx password (from above) when prompted
Initial error: error 0x800b0101 a required certificate Error: https://social.technet.microsoft.com/Forums/en-US/8e909824-4ef5-4314-a382-d2fb515f1077/error-0x80072746-an-existing-connection-was-forcibly-closed-by-the-remote-host?forum=winserverPN Part of solution: http://blogs.technet.com/b/rrasblog/archive/2009/02/11/sstp-certificate-selection.aspx