I just came across this interesting video about how to migrate mailboxes to BPOS using PowerShell saving you time of having to go through the web interface each time. If you’re doing a bulk migration this is a very efficient way of doing it.
The video is really well done and walks you through, explaining it brilliantly step by step.
as you save your excel file containing your sourcecredentials and targetcredentials as csv file, the delimiter used could be a ';'.
If this is so, use the following Powershell command:
$users = import-csv c:\<your file including full path> -delimiter ";"