I am planning an upgrade of GroupWise from 8 to 2012, as well as a migration off of Windows 2008 where it is now, to SLES. I see Danita has an upgrade guide available and I will probably get that, but does it cover the migration to Linux from Windows? My main reason for migrating is to improve performance of GroupWise. I know my disk system is a bottleneck, and I get a lot of complaints as a result. My understanding is that the performance is inherently faster on Linux. That plus hopefully beefed up disk hardware will provide a much more pleasant user experience. That said, I am especially concerned about the OS migration since I have little Linux experience. I would need someone or something to handhold me through the process. Can anyone recommend any resources?