Illogically Speaking
As Spock would say, sometimes, fixing a computer requires illogical solutions.
On Friday, our IT people were able to get me access to the Intraweb server again. They did it the old fashion way: by facing in the right direction and incanting the correct magic syllables.
Actually, they did what smart IT people do: they applied logic and began to eliminate possible sources of the problem. First, they attached a laptop to our network drop and determined that the problem was not specific to my PC. By doing this, they refrained from wasting hours trying various changes on my PC that probably would not have made a positive difference.
Once they determined the problem was not specific to my PC, they focused on the server's configuration. This is where the chanting came in because they couldn't find anything wrong. Yet every time anyone would try to login they would end up in the wrong directory. They tried deleting my login and creating a new one but no joy.
So, they copied everything in the directory I needed to get to and temporarily stored it in a new directory. They then deleted the old directory and re-created the directory again. After which they copied the files back in and all was well.
No one knows why that worked but it did and so far it still does.