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SharePoint has a couple of default groups but say we want to create our own group. The values that we need to assign are:

String name
SPMember owner
SPUser defaultUser
String description

Name and description are strings. SPMemeber Owner and SPMember defaultUser are a little tricky.. You have to retrieve these from existing Users in SharePoint. In this example we will add the Admin account to the group.

[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")

PS > $SPSite = New-Object Microsoft.SharePoint.SPSite(http://wss); $OpenWeb = $SPSite.OpenWeb(); $OpenWeb.SiteGroups.Add("The New Group", $OpenWeb.SiteUsers["BPA\sharepoint"], $OpenWeb.SiteUsers["BPA\sharepoint"],"Description of The New Group"); $OpenWeb.Update(); $OpenWeb.Dispose(); $SPSite.Dispose()

If you look in Sharepoint through Internet Explorer, the group will only be visible if you navigate to People and Groups: All Groups as shown in the screenshot below.

To add the group to the QuickLaunch bar, we have to add our New Group to the Associated Groups.

PS > $SPSite = New-Object Microsoft.SharePoint.SPSite(http://wss); $OpenWeb = $SPSite.OpenWeb(); $OpenWeb.AssociatedGroups.Add($OpenWeb.SiteGroups["The New Group"]); $OpenWeb.Update(); $OpenWeb.Dispose(); $SPSite.Dispose()

Now the group will be visible in the QuickLaunch Bar.