If you want the REAID synchronization set up for an already existing list/segment:

1. Go to Klaviyo, select the segment/list you want the REAID synchronization set up for and then add a property named “RaptorReaId” on a random user. Set the Value = 0.
   
   
   
2. Go to the Raptor Control Panel and find “Email Marketing Integration” in the menu.
   Select Klaviyo.
   
   
   
3. Insert the KlayviyoApiKey and the SegmentID/ListID of the segment/list you want the REAID synchronization set up for. 
   
   
   

If you want the REAID synchronization set up for a new segment/list:

1. Go to Klaviyo and add a property named “RaptorReaId” on a random user. Set the Value = 0.
   
   
   
2. Go to Lists & segments and create a new segment, then find all the users where the “RaptorReaId” property is not set and click on Create Segment.
   
   
3. Go to the Raptor Controlpanel and find “Email Marketing Integration” in the menu.
   Select Klaviyo.
   
   
   
4. Insert the KlayviyoApiKey and the Segment ID/ListID from the segment/list you just created in Klaviyo.