I'm looking to use exmerge to create PST files for all of my users (about 200) on my Exchange 5.5 server. I then want to import that data into the new Exchange 2003 server. Question: all of the usernames are different from one server to the next (we took this upgrade opportunity to finally standardize our login names). So, if we rename the PST files that Exch5.5 creates to the new usernames, is there an easy way to import on Exchange 2003? I'm just beginning my research on this, so I'll be looking for the answer too.