How can you change the OST data file that a Windows/Outlook email profile points to?

"I guess you can't move the pst/ost file through the mail settings appelet - you could just copy the file to the new location in explorer and then:

Go in to the ""Mail"" Control Panel applet
Click the ""Data Files..."" button
use the 'add' button to browse for the copied file
set the copied file as default ost file
remove the 'old location' ost file

between step 4 and 5 a dialogue requesting to start outlook once may pop up, in that case just do that and remove the old file afterwards"

If you can't alter path/file: Diable offline use, then re-enable it and you can browse to new location