Simon Catlin questions

Simon Catlin answers

• Invoke-Expression: Positional parameter cannot be found that accepts argument /s
• Check if an environment variable is defined without command extensions and without using a batch file?
• PowerShell: New-SelfSignedCertificate : CertEnroll::CX509Enrollment::_CreateRequest: Invalid flags specified. 0x80090009
• Windows CMD %ERRORLEVEL% in nested IF