Microsoft as it can lead to poor performance, data corruption and even
data loss. As indexing is an I/O intensive process, the fact that Outlook
gets unresponsive for network connected pst-files is to be expected; keep
your pst-files on your local hard disk when you want to work with them in
If you are working with a PST on a network share - expect problems. Rather
copy the file to the local HDD and import the data from there into Exchange.