I have created a plugin that allow you to see the full activity of who are accessing your workbook that gets checked against the rest api…this will show you completely who is validating your workbook at what time with what IP address and with what order.Now you have full access to see who access it and to prevent no unauthorized access of your files.This will ALSO show who activate a workbook.This was requested by another user here and I thought this is a highly needed feature and FREE OF CHARGE -Njoy
Install Xlspadlock.zip like a normal addin in wordpress
Only available for 30 days the download!!! Its a full version!!!