A shared file exists to a number of Windows 7/8 PCs on a mapped network drive like so:
G:\plan.xlsx
How can one lock or control the file so as it is only editable by one person at a time?
Conflicts are extremely cumbersome to resolve, and there are not notifications when it is currently being edited.
11 Answer
By default, workbooks are only allowed to be edited by one at a time unless you've enabled sharing on it.
To check if sharing is enabled, go to the Review tab, click Share Workbook and uncheck Allow changes by more than one user at the same time.
Should anyone open the workbook without sharing enabled, they will be prompted that the workbook is in use by {username} and they will only be allowed the data as read only.