Ok, the problem is resolved. For anyone who is interested. We
looked at Apache access.log and noticed a HUGE number of PROPFIND
requests narrowing this down it seems opening a word document from
our CF application then closing it caused a loop to be set up.
Essentially when the doc closed it tried to open the
index.cfm which redirected to home.cfm and somehow went back to
index.cfm
Changing apache set up to use home.cfm instead of index.cfm
fixed the issue.