We sent an email to all of our offices to read the instruction at
http://wiki/instructions.blah blah. They couldn't get to it.

Each office has a suffix of location.domain.com, i.e.
workstation.ny.ourdomain.com. Since "wiki" was not an A record we added it
to each location..i.e. wiki.ny.domain.com.

Some of them work and some don't. It seems Wiki.domain.com works, but not
just "wiki". What could the matter be?