HTTP/2 not working in IIS (Tip: Use IIS Crypto)

Hi all,

If you're struggling to get HTTP/2 working in IIS despite having a valid SSL binding, the issue is likely your Windows Cipher/TLS configuration. IIS requires specific modern settings that are often not active by default.

The Fix:

1. Download IIS Crypto (Nartac Software).

2. Run it and click "Best Practices".

3. Apply and Reboot the server.

4. Edit registry-key*, change value to 1

This tool correctly configures Schannel for HTTP/2 support without manual registry edits.

Note for MSSQL users: Ensure your Microsoft OLE DB Driver is up-to-date. Disabling older TLS versions (1.0/1.1) via Best Practices can break connections for outdated SQL clients.

Hope this saves you some debugging time!

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