I just checked my Domino Directory. I have a personal number listed for all users in the User name field of the Person Document. It is the last value.
I guess I made a mistake by telling you to use the Short Name field.
I then opened a browser and accessed my mail using the personal number and my Lotus Notes internet password. I am now looking at my mail in a web browser. So, I know that this works.
Is it a replication issue? Can no one use the personal number to access their mail? Is there an error appearing on the Domino Console or in the Notes Log that can help pinpoint the problem?