After moving DGN files to a different server location, the DDE links in any DGN file(s) that were moved are not updated.... point back to the original location.
The only way to edit these DDE links is manually... 1 at a time. This is OK for a few links but not OK if you have 100's of DGN files with multiple DDE links in each file.
Bentley Technical Support said a custom VBA would need to be written to accomplish this. I am not a programmer.
A similar tool already exists when this situation occurs in Print Organizer. You can simply run the Change Path tool and change the path to all of the DGN files in your Print Organizer pset - with simple push of the button (after entering the existing path and new path locations).
Just had to do this same thing. Moved all of our CAD files from one project folder to another. No changes in any data or folder structure, simply a folder name change. I manually updated about 40 spreadsheet links. I know I could probably have avoided this by placing all of the data in a workset (which didn't change), but the project was not set up that way. Should be a relatively easy addition for a tool to open a dialog, add files to it and specify text to find and replace in the file path. I'm not good with VBA either.