@SaurabhDeswal  Can you create an audience with the latest purchase date/order date less than 7 days from the current date and use the audience in a journey to send reminder purchase mail?

@gmuirkb  can you cross-check on filters,  Were there any extra filters applied on top of unique email opens metric ? if all looks correct and, still see a huge difference in counts, please create a support ticket.

@gmuirkb  Could you please verify that the date range of the calendar is the same for both reports? A little difference in the counts is expected, but not how it is mentioned above.

@uk685  This could be because duplication status is not enabled in placements. do allow duplication at placements and validate.   check out the multiple scope section https://experienceleague.adobe.com/en/docs/journey-optimizer/using/decisioning/offer-decisioning/create-manage-activities/create-offe...

Please look at the blog which covers the difference between Adobe Campaign & AJO in detail and the need for co-existence of these 2 tools. https://experienceleaguecommunities.adobe.com/t5/journey-optimizer-blogs/co-existence-of-adobe-journey-optimizer-ajo-and-adobe-campaign/ba-p/694403

Brands are merging customer data to create unified profiles using Adobe Journey Optimizer (AJO), while also transitioning to Adobe Campaign V8 for enhanced marketing automation. These platforms, when used together, offer unparalleled capabilities for real-time targeting, personalized campaigns, and ...