Deleting a contact list item through Powershell in sharepoint 2010 synced with outlook 2010, does not delete the item from outlook.

Question

hi All,
I have a requirement for updating the contact list from CSV file and updating/ adding and  deleting the changes in the SharePoint list using PowerShell script. List is also synced with outlook.
The problem arises, when we delete an item from the list using PS, the item (which was earlier synced with outlook) is not getting deleted from outlook.
Strange behavior : when we perform the same deletion operation manually from the SharePoint UI, every thing works fine as required.
Please refer the below PS
#Adding the records from SharePoint not in CSV file
if($flag -ne 1)
Get-Member -InputObject $csvRow -MemberType NoteProperty | ForEach-Object {
$property = $_.Name
$newItem.set_Item($property, $csvRow.$property)
$newItem.Update()
#Deleting the records from SharePoint not in CSV file
CreatePSLog "Deleting the records from SharePoint not in CSV file"
foreach($itm in $List.items)
$del = 0
$items | ForEach-Object {
if($itm["SAP Ansprechpartnernr"] -eq $_."SAP Ansprechpartnernr")
$del++;
if(!$del)
$List.GetItemById($itm.Id).Delete()
$List.Update();
$Web.Update();
many thanks in advance, Please suggest as I am completly stuck on this :(
Regards, Arun kumar

Answer 1

Hi Kumar,
Please remove the codeline $List.Update();, then run your code again, it works for me.
You may need to firstly delete the synced contacts list within Outlook to remove those undeleted accounts, then re-connect the SharePoint contacts list to outlook, then run your modified Powershell code.
Thanks
Daniel Yang
TechNet Community Support