Recently I was doing some testing with a background PowerShell and encountered a weird error. “Identity client runtime library (IDCRL) did not get a response from the login server”. The error that you might encounter while working with PowerShell. This error is very misleading when it comes to identifying what could go wrong. After doing quite a good amount of research below are the probable causes for the error. Invalid Credentials MFA (Multi-Factor Authentication) Manage security defaults. Solutions Invalid Credentials Check if your credentials are wrong. Especially if you are using variables. MFA (Multi-Factor Authentication) Check if MFA is enabled on the account which you are using. These only affect you badly if you are developing PowerShell for a background Job. Go to Microsoft 365 admin center Users -> Active users -> Select the user -> Manage multifactor authentication -> Select the user -> Disable multi-factor authentication. M