Mounts and Dismounts commonly used network shares

MapDrives.ps1

<#
.Synopsis
   Maps commonly used network shares
.DESCRIPTION
   Maps drives for commonly used network shares. Username parameter will map the drives as a specific user
.EXAMPLE
   Mount-CommonShare
.EXAMPLE
   Mount-CommonShare -Username stcxyz
#>
function Mount-CommonShare
{
    [CmdletBinding()]
    [OutputType([int])]
    Param
    (
        [Parameter(ValueFromPipelineByPropertyName=$true,
                   Position=0)]
        $Username
    )

    if ($Username -eq $null)
    {
    New-PSDrive -Name "Z" -PSProvider FileSystem -Root "\\server1\share" -Persist -Scope global
    New-PSDrive -Name "Y" -PSProvider FileSystem -Root "\\server2\share" -Persist -Scope global
    New-PSDrive -Name "X" -PSProvider FileSystem -Root "\\server3\share" -Persist -Scope global
    }
    else
    {
    New-PSDrive -Name "Z" -PSProvider FileSystem -Root "\\server1\share" -Persist -Scope global -Credential $Username
    New-PSDrive -Name "Y" -PSProvider FileSystem -Root "\\server2\share" -Persist -Scope global -Credential $Username
    New-PSDrive -Name "X" -PSProvider FileSystem -Root "\\server3\share" -Persist -Scope global -Credential $Username
    }
}