A quieter release, but a useful one. Winter 2026 adds campaign exclusion rules, reworks the historical backfill engine, and fixes a handful of edge cases that only showed up if you had enough data to find them.
Campaign exclusion rules
You can now exclude specific campaign types from attribution calculations. Running internal test campaigns or employee events that kept showing up in your pipeline reports? Mark them as excluded and they vanish from attribution without deleting any data. The spreadsheet workaround is officially retired.
Redesigned backfill engine
Historical backfill has been rebuilt from scratch. The previous version could time out on orgs with more than 500,000 campaign member records. The new engine processes records in smaller batches, respects Salesforce governor limits more gracefully, and finishes the job even if your org has years of campaign history.
Lead conversion fixes
A small number of orgs saw attribution data drop off when leads converted to contacts in bulk. This happened because the conversion trigger fired before the attribution trigger could finish. Both triggers now coordinate properly, so no attribution records are lost during conversion.
Other improvements
- Attribution Dashboard now loads 40% faster on first visit
- Fixed a display issue where campaign names with special characters rendered incorrectly in reports
- The setup wizard now detects existing Campaign Influence configuration and warns before overwriting
