How to: Enroll a SharePoint group, an active directory security group or an Exchange distribution list using Event Management

$web = Get-SPWeb http://yoursite
$list = $web.Lists["Enrollments"]
$list.RootFolder.Properties.Add("Sapiens.at.SharePoint.ResolveADGroups", 1)
$list.Update();

#your SharePoint site URL
$webURL = "http://yoursite"
#names of all distribution lists to import to SharePoint
$groupNames = @("group1","group2")
 
#group description in SharePoint
$importedGroupDescription = 'Imported from AD'
#get groups from ad
[System.Reflection.Assembly]::LoadWithPartialName("System.DirectoryServices.AccountManagement");
$ctx = New-Object System.DirectoryServices.AccountManagement.PrincipalContext([System.DirectoryServices.AccountManagement.ContextType]::Domain);
$qbeGroup = New-Object System.DirectoryServices.AccountManagement.GroupPrincipal($ctx);
$srch = New-Object System.DirectoryServices.AccountManagement.PrincipalSearcher($qbeGroup);
 
#open SharePoint site
$web = Get-SPWeb $webURL
#get all groups with groupdescription
$allGroups = $($web.SiteGroups | where { $_.Description -eq $importedGroupDescription })
 
#import ad groups
ForEach($adGroup in $srch.FindAll() | where { ($groupNames -contains $_.Name) })
{
    $groupName = $adGroup.Name.Replace("@", "_")
    $adGroupMembers = $($adGroup.Members)
    $spGroup = ($allGroups | where { $groupName -eq $_.Name })
    if($spGroup.length -gt 0){
        #SharePoint group already exists
        $spGroup = $spGroup[0];
    }
    else{ 
        if($spGroup -eq $null) {
            #create SharePoint group
            $web.SiteGroups.Add($groupName, $web.SiteAdministrators[0], $null, $importedGroupDescription)
            $spGroup = $web.SiteGroups[$groupName]
        }
    }
    #check and add users to SharePoint group
    ForEach($adUser in $adGroupMembers){
        $spUser = $web.EnsureUser($adUser.EmailAddress)
        if($spUser -ne $null){
            $groupUsers = ($spGroup.Users | where { $_.Email -eq $spUser.Email })
            if($groupUsers.length -eq 0 -or $groupUser -eq $null){
                $spGroup.AddUser($spUser)
            }
        }
    }
    #check and remove users from SharePoint group
    ForEach($spUser in $($spGroup.Users)){
        $adUser = $null
        ForEach($m in $adGroupMembers){
            if($spUser.SystemUserKey -ne $null){
                ForEach($sid in $m.Sid){
                    if($spUser.SystemUserKey.ToLower().EndsWith($sid.Value.ToLower())){
                        $adUser = $m
                        break
                    }
                }
            }
            else{
                if($m.EmailAddress -eq $spUser.Email){
                    $adUser = $m
                }
            }
            if($adUser -ne $null){ break }
        }
        if($adUser -eq $null){
            $spGroup.RemoveUser($spUser)
        }
    }
}