In , Pasi
spake thusly:

We would like to have a workbook stored in our ISPs
server (accessable using FTP & SFTP). Is there a
way to access the workbook so that either locking
or shared workbook editing would work?

This would not be something you could control in Excel.
You would have to have a server-side control of some sort.
For example, the server could run a gate such that only
one copy could be downloaded until the gate is released.
I can't think of any turnkey solution, off-hand. Maybe
a script on the server that re-points a link to a locked
copy of the workbook once someone has downloaded the unlocked
vrsion. But whatever, the solution can't be from Excel,
that I can see.

-dman-