Function: Get-PstFiles – List All .pst Files In A Given Path, With Name, Path, Size, and Owner
If you need to make a list of the .pst files in a given path, this function should help. It will get all .pst files, their name, path, size (in MB), and owner. This should help if you’re looking at importing the files in Exchange Server. If you’d like to export the results to a file, use the -file switch, with a filename, and the function will save the info to a .csv file.
Get-PstFiles [[-path] ] [[-filter] ] [[-file] ] [-WhatIf] [-Confirm] 
v1.1 – 05-13-2013 Get-PstFiles.v1.1.zip