Each tracked revision has a Date property which includes the time and can be revealed by vba so you can still examine that property


ActiveDocument.Revisions(1).Date

The Total Editing time property gets reset to 0 if you have enabled the Document Inspector to remove "Document Properties and Personal Information". If you avoid that resetting then the Total Editing Time gives a reliable indication of how long the document has been opened rather than the time it has been actively edited.

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Andrew Lockton
Chrysalis Design, Melbourne Australia