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1 change: 1 addition & 0 deletions src/engage/trait-activation/id-sync.md
Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,7 @@ With Customized setup, you can choose which identifiers you want to map downstre
- ID Sync used on existing audience destinations or destination functions won't resync the entire audience. Only new data flowing into Segment follows your ID Sync configuration.
- Segment doesn't maintain ID Sync history, which means that any changes are irreversible.
- You can only select a maximum of three identifiers with an `All` strategy.
- Segment recommends that you map Segment properties to destination properties using [Destination Actions](/docs/connections/destinations/actions/#components-of-a-destination-action) instead of ID Sync.


## FAQs
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