am trying to create users by importing their details saved in csv format. please find below the script Import-csv xyz.csv | foreach { New-Mailbox -name $_.FirstName -Alias $_.FirstName -FirstName $_.FirstName -LastName $_.LastName -UserPrincipalname "$($_.FirstName)@test.com" -OrganizationalUnit Users -Password $Password -Database "Mailbox Database" -ResetPasswordOnNextLogon $True } but it keeps giving me the following error. you must provide a value expression on the right-hand side of the '-f' operator .You must provide a value expression on the right-hand side of the '-f' operator.At script1.ps1:2 char:16+ $_.FirstName -Fi <<<< rstName $_.FirstName -LastName $_.LastName -UserPrincipalname how do i handle the _ symbol whenrunning powershell scripts?

Backtick (') is escape character in powershell. you can read more about it here: http://technet.microsoft.com/en-us/library/bb978698.aspx

the page has been removed or no longer available. at what point should i use the ' character

Sorry the site was down when you must have checked. The page is working now and you can check it for examples.

Put your powershell code in single line insead of spanning into multiple lines and check... I just tested and worked for me. Code Snippet Import-csv xyz.csv | foreach { New-Mailbox -name $_.FirstName -Alias $_.FirstName -FirstName $_.FirstName -LastName $_.LastName -UserPrincipalname "$($_.FirstName)@test.com" -OrganizationalUnit Users -Password $Password -Database "Mailbox Database" -ResetPasswordOnNextLogon $True }