SharePoint 2010 Enable Visual Upgrade on Sites with PowerShell

To enable the look and feel choice back to enabled on every site within a site collection, use the script below. Replace SiteCollection with the actual URL for your site collection.

$SiteCollection=Get-SPsite http://SiteCollection
foreach($SPWeb in $SiteCollection.AllWebs){$SPWeb.UIversionConfigurationEnabled=$true;$SPWeb.update();}

To enable the look and feel choice back to enabled on a single site use the following command. Replace Site with the actual URL for your site/web.

$Site=Get-SPWeb http://Site
$Site.UIversionConfigurationEnabled=$true;$Site.update();

Next tip I will show you how you can go back and forth between look and feel versions even on a brand new 2010 site. So if you just love the WSS 3.0 site look you can get that too right in SharePoint 2010.