Add-PSSnapin Microsoft.SharePoint.PowerShell -erroraction SilentlyContinue
#PowerShell Function to copy permissions between Lists in SharePoint
Function Copy-ListPermissions()
{
param(
$WebURL,
$TargetWwebURL,
$SourceListName,
$TargetListName
)
#Get the Web
$Web = Get-SPweb $WebURL
$TargetWeb=Get-SPweb $TargetWebURL
#Get Source and Target Lists
$SourceList = $Web.lists[$SourceListName]
$TargetList = $TargetWeb.lists[$TargetListName]
#if permissions are Inherited in Source, apply it in Target list
if($SourceList.Permissions.Inherited)
{
$TargetList.ResetRoleInheritance()
}
else #Copy permissions from Source to Target List
{
#Reset the Inheritence in Target List
$TargetList.BreakRoleInheritance($false)
#Copy Source list permissions to Destination List
$SourceList.RoleAssignments | foreach-object {
$targetList.RoleAssignments.Add($_)
}
}
$TargetList.Update()
}
#Call the function to copy list permissions
Copy-ListPermissions “Source Site url” “Dest Site Url” “Source List” “Dest List”
