How to convert string to boolean in this Powershell code for Exchange Online?

Be careful with -as. It only works when a string is 0 or 1.

Both ("FALSE") -as [bool] and [bool]("FALSE") will return True!

It's better to use

[System.Convert]::ToBoolean("FALSE")[System.Convert]::ToBoolean("False")[System.Convert]::ToBoolean(0)

Or Parse

[bool]::Parse("FALSE")[bool]::TryParse("FALSE", $outputVariable) # Will not raise an exception if the parse fails

Parse only works with strings as parameter.

powershell exchange-server

You can also use the -as operator

-HiddenFromAddressListsEnabled ($_.HiddenFromAddressListsEnabled -as [bool])

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