Though not common, as of late, a hybrid approach is also getting a bit more play. Rather than migrate all legacy content from the incumbent content management system over to SharePoint, some organizations are electing to take the best of breed approach where historical or retired content continues to exist within the older platform while SharePoint serves as the new platform for collaboration. Though the implementation of a single-sign on (SSO) authentication might provide ease in working off of multiple platforms simultaneously, some organizations have taking this a bit further by integrating SharePoint with the existing content management application resulting in a seamless one platform user interface (UI) that has both SharePoint and legacy content on one screen. A single platform UI coupled with an enterprise search ability to seek content over all platforms provides the utopian state of the best of breed options.