Fortunately “Mass Mail Merge” accomplishes this quite easily. However, if you want to have Salesforce to create Word documents for hundreds of records, the Mail Merge button would be an unbelievable tedious way to accomplish this task. mail merge) with data from the record you are viewing. Extended Mass Mail Merge is a powerful feature available from Salesforce that unfortunately is not turned on “out of the box.” Natively you can use the “Mail Merge” button in the Activity History related list to create a single Word documents that populates (i.e.