Just recently I found out how difficult is to search through out my split archives.  I found this recourse but, really doesn’t give me the information that I need in order for me to be able to merge my archive *.nsf files.  So, instead here I am documenting how you can merger multiple Lotus Notes archive files.

1. make sure that your folder structure is the same across archives.  If is not, then create the folders in the archive where you will be moving the data to.
2. backup your archives just in case something goes wrong
3. create an archive replica where you would like to move the files to
4. go to your workspace
5. right click on the replica that you would like to move data from
6. go to Applications -> properties
7. Click on “Archive Settings…”
8. Create a new setting.
9. Click “Selection Criteria…” . In this case we are going to move any file that hasn’t been modify in the last 1 day.
10. Check “Enable this criteria”
11. Update the section “What Should Happen to the Selected Documents?” and choose the archive db where you will be moving this data to.
12. Once you are done click “OK”, then “OK” again.
13. At this point you should be back to the workspace.  Double click/open on the archive db that you would like to move data from.
14. Go to File -> Application -> Archive…
15. Then hit “Yes”
16. Let it run in the background until all your emails has been moved.  Hit F9 to refresh window if you are not sure if all your emails have been moved.
17. before saying viola … double check that everything has been move and then viola!!! enjoy having only one archive.

Let me know whether this documentation didn’t help you or not 🙂

Source Move messages from one Lotus Notes archive to another.