Assess what applications people are accessing and alert users in advance to any changes post-migration. For example, you may choose to sunset an old application that isn't compliant with the new version of Windows and not worth upgrading. Or, you may find many people are using a non-compliant application that will be removed from their computers during the upgrade. Let's say your discovery tool shows 50 percent of users are using AOL Instant Messenger, an application you only want available via a request to IT. Proactively sending out a notice, with instructions on how to request AIM later through the IT service catalog, can help to reduce a slew of "Where's my AIM?!" calls post-migration.