How to Fix TLS “SchUseStrongCryptoValue: Null

If you are getting “StrongCrypto” error as below after configuring TLS on your Microsoft Exchange Servers;

v4.0.30319 SchUseStrongCryptoValue: NULL --- Error: Value should be defined in registry for consistent results.
v4.0.30319 WowSchUseStrongCryptoValue: NULL --- Error: Value should be defined in registry for consistent results.

The values you need to define for “StrongCrypto” are as follows:

Set “Strong Cryptography” on 32-bit .Net Framework

Set-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\.NetFramework\v4.0.30319' -Name 'SchUseStrongCrypto' -Value '1' -Type DWord

Set “Strong Cryptography” on 64-bit .Net Framework

Set-ItemProperty -Path 'HKLM:\SOFTWARE\Wow6432Node\Microsoft\.NetFramework\v4.0.30319' -Name 'SchUseStrongCrypto' -Value '1' -Type DWord

Have a nice day!