Hello to all.This is more of an FYI for those who may run in to it. We upgraded to Windows 7 machines (all Dell OptiPlexes) a few months ago. I had Windows Fax and Scan working wonderfully on my computer and about a month ago it quit working. I renamed my computer so I could more easily understand whose computer it was on the network.
Now when I try to send a new fax, it immediately pops up a message that says: "New Fax: Unable to retrieve cover pages associated with the selected account." Then it brings up the regular faxing window and I prepare a fax and when I press Send, I get this message: "The message could not be sent. The RPC server is unavailable." Down at the bottom of the screen there is a message that says "All fax accounts are inaccessible".
After much searching, I found this link kb/930087 and followed the instructions to delete the fax account and set up a new account. That took care of my problem.
Just posting it here in case it can help someone. I have spent many a frustrating hour trying to get my fax working, today I found the answer.