I'm sure I have seen on the forum that If you migrate from IntraLink 3.4 to Windchill/IntraLink 10.2 that you later could not chose to switch Windchill/IntraLink over to Windchill/PDMLink?
You can migrate Intralink 3.4 to Intralink 10.2 or PDMLink 10.2, it does not matter. If you migrate to Intralink 10.2 you can easily upgrade to PDMLink 10.2 at a later time. However, if you migrate to PDMLink 10.2, you can't move to Intralink 10.2.