IPInstaller,
I assume that you have there description in the following format: lastname, firstname
If so there should be no reason that they do not show up and according to Mitel Tech Support, in previous conversations, there is not a way to remove names from the directory search; like with the Axxess.
You can however sort of move them to the back by putting a ~ in front of the name, which also removes them from the Voice Processor Dial by Name Directory. This will put a * in front of the IC Directory and move them to the end I believe.
Now that being said I have run into this issue over the years and found that deleting and recreating the extensions seemed to allow them to be included in the directory, but in the end I have not really found a sure-fire way to do it. I have not had all of one type of phone go missing from a Directory search however so that seems more like a design flaw or undocumented feature.
Sorry,
TE