Q. How can I make PowerShell prompt for alternate credentials?

A. To make PowerShell prompt for alternate credentials, run something like

$cred = Get-Credential username

Doing so will prompt for the credential and store the results in the $cred variable for future use. Note that there's no way to provide the password via the command line, and there's really no secure way to permanently store a username/password combo. (Yes, you could encrypt it, but to read it back in you'd be hard-coding the decryption key, so what's the point?)

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