I'm not sure what additional detail will help.
The format of the file is as shown here (I'm using real names in the real file etc.)
name@organisation.org.nz,display name,password<NL>
name2@organisation.org.nz,display name2,password2<NL>
... etc to my last user ...
name11@organisation.org.nz, display name11,password11<EOF>
I have tried recoding from unix to dos with no effect.
Then I'm inputting this file from the Bulk Provision option in the Zimbra Admin Accounts page and after the last full line and any following empty lines are returning an error:-
Linexx

arse error:Invalid number of columns.
It is ONLY the last full line and any trailing empty lines that raise the error.
If I introduce a space after the comma (as suggested by the bulk-provision window) then the spaces would seem to be included as part of the data judging by the window display and, in any event, the error recurs.
I had searched the forums but not found any help - of course I may have missed something.
Although I have only 11 users to add, it seems to be an issue that needs resolving.
Is there more I can add, because this information was pretty much in the original post, I thought?
Thanks.