It is possible to export the Outlook Email Accounts direct from the Registry and import it back on the other installation. To do this open the Regedit and go to:
[HKEY_USERS\S-1-5-21-xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxx\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook
Note: "S-1-5-21-xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxx" is your GUID, which will differ for each installation.
Edit or delete entries as you need, then export the entire key to a file and import it into your new installation!
If you use this method to move the settings to another PC, make sure you do a search and replace on the xxxxx as your GUID will be different.
It's usually a good idea to back up the existing key on the new PC before deleting it. Remember to always make a registry backup first and just be careful in there!
It works for me all the time. My "FULL backup procedure" is simple:
1) Save the PST file (which is your Post Office file, containing all the e-mails, calendar, address book, etc)
2) Export your RULES
3) Export the aforementioned Registry Key
To import it on another installation is simple (just a few more steps):
1) Open Outlook at least ONCE and DO NOT create an e-mail account at this time. Just follow the start up screens until it is done.
2) Find out the location of your PST file (go to TOOLS -> ACCOUNT SETTINGS -> DATA FILES). Take a note of the PST file location.
3) Close Outlook (don't minimize, CLOSE IT).
4) Go to the folder where the PST file is located and DELETE IT, replacing it by your own backup copy
5) Open the REGEDIT and import the KEY with your email accounts settings (make sure you have changed the GUID on the backup file as explained above)
6) Open Outlook again. Don't be scared if it gives you an error message. Just ignore it and close the message window. Outlook will open with all your e-mails and accounts already restored.
7) Import the RULES back (TOOLS -> RULES AND ALERTS -> OPTIONS -> IMPORT RULES). Note that you may have to "adjust" some rules in very rare cases. In most cases you just need to re-enable them.
8) As your PST file uses "direct access" to link some "shortcuts", the Address Book link will probably be lost (but all the addresses you have are still there). To fix it just delete the EMPTY address book on the tree and link yours using the address book tool to fix the shortcuts (TOOLS -> ADDRESS BOOK).
