My suggestion is the same as Johns,
Simply use ExMerge To Import the PSTs into the jounal mailbox.
Using ExMerge to import PST files
1) Place all of the PST files that you want imported into a single Folder
2) Copy the files Exmerge.exe and Exmerge.ini to your Exchange Bin directory. (Default is C:\Program Files\Exchsrvr\Bin for Exchange 2000 and 2003)
3) Run Exmerge.exe
4) Click Next on the Welcome screen
5) At Procedure Selection, choose Extract or Import (Two Step Procedure) and click Next
6) Choose Step 2: Import data and click Next
7) On the Destination Server page, enter the name of your exchange server. You may also enter additional options by clicking on the options button:
8) After entering the server name and any options, click Next
9) Mailbox Selection – here you can choose the mailboxes to import, if you select all, any mailboxes that a PST does not exist for will be skipped.
NOTE: ExMerge will look for a PST file that matches a naming convention of “Alias Name”.PST, when a recovery is performed the Alias name is unknown to DTI Data, so the PST files will be named “Display Name”.PST, which may match your organizations Alias or it may not. If it does not match what is listed as the alias for a user, Exmerge will skip that mailbox. You will see in the log files if a mailbox is skipped because of a PST not being found. It may be necessary to rename the PST files prior to running Exmerge. EG:
John Best, the alias name is Jbest and the PST file name Jbest.pst.
10) On the Locale Selection, leave the default (English), unless necessary to change it and click Next
11) Target Directory – Browse to the folder containing your PST files and click Next
12) Save Settings – if you choose, you may save the settings into an Exmerge.ini file for use at a latter time
13) After clicking Next, Exmerge will run through the process of importing data, utilizing several threads. After it is finished, click the Finish button
14) Check the logs (from the same directory Exmerge was run from) named Exmerge.log and ExMerge-(Thread[n]).log for any errors encountered during the process.
Download ExMerge:
Documentation:
