Out of the box in SharePoint 2010 all users who have a profile are also defaulted to having email notifications set to “on”.   This might make sense in a small scale implementation but for my customer that was unacceptable.  I created a powershell script that iterates through the user profiles and turns the notifications off.  This script is similar to ones I’ve posted before for working with the user profile however it uses different fields.  The SharePoint field is called SPS-EmailOptin. This field disables both SharePoint and NewsGator emails.

Of course in future releases these field names might change so you should verify before using this script.  In my case this was SharePoint 2010 October CU and NewsGator Social Sites 1.2.2419.

#Load the SharePoint snap-in
Add-PsSnapin Microsoft.SharePoint.PowerShell;

#Load the SharePoint assemblies
[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.Office.Server");
[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.Office.Server.UserProfiles");

#Specify the MySite URL
$MySiteUrl = "http://sharepoint.vallery.net/";

#Get the server context for the profile manager
$site = Get-SPSite $MySiteUrl;
$ServerContext = Get-SPServiceContext $site;
$UPManager = new-object Microsoft.Office.Server.UserProfiles.UserProfileManager($ServerContext);

#Count variables
$ucount = 0;

$enumProfiles = $UPManager.GetEnumerator();
"Total User Profiles available:" + $UPManager.Count
$count=0;

#Loop through the profile entries and update the property
#Recieve Instant Notifications - NGAllowMetaEmail (bool)
#24 Hour Digest Email - NGReceiveDigestEmail (bool)
#RSS NewsFeed Email - NGAllowRssEmail (bool)
#SharePoint Notification emails - SPS-EmailOptin (int)
#This field has 3 values one for each email type

foreach ($oUser in $enumProfiles)
{
    $count = $count + 1;
    $u = $oUser.Item("Accountname");
    Write-Output "($count):  Setting values for $u";

    $oUser["NGAllowMetaEmail"].Value = $false;
    $oUser["NGReceiveDigestEmail"].Value = $false;
    $oUser["NGAllowRssEmail"].Value = $false;
    $oUser["SPS-EmailOptin"].Value = 111; 

    $oUser.Commit();
} 

#Dispose of site object
$site.Dispose();