You may also deploy two server-side add-ons: Presto Add-On for SharePoint and the Presto Add-On for Portals. See Installing Presto Add-On for SharePoint and Installing the Presto Add-On for Portals for instructions.

Users may also need to install the Presto Add-On for Excel, an add-on toolbar for Excel, to work with mashables and mashups in Microsoft Excel or to publish spreadsheets as mashables. See Install the Presto Toolbar in Excel for details.