Options.StoreRSIDOnSave Property (Word)
True for Microsoft Word to assign a random number to changes in a document, each time a document is saved, to facilitate comparing and merging documents. Read/write Boolean.
Word stores the random numbers in a table and updates the table after each save. The default for the StoreRSIDOnSave property is True. However, RSID information is not saved for HTML documents.
Use the RemovePersonalInformation property if you want to remove information related to authors and reviewers of a document.