Update index.md

DMP Update

Author: marinhero

src/connections/destinations/catalog/actions-display-video-360/index.md

@@ -135,7 +135,7 @@ Segment will copy all of your existing Personas Display & Video 360 Destination
 
 ~~The sole mandatory action involves **re-authenticating** for each migrated Personans Display & Video 360 Destination. While you may already possess OAuth credentials, it is essential to undergo reauthentication. This step is necessary to seamlessly integrate new audiences or implement updates to existing ones.~~
 
-As of 04/02/2024 authentication is not required anymore. We'll be using Segment DMP's credentials to authenticate on your behalf.
+As of 04/02/2024 authentication is not required anymore. We'll be using Segment DMP's credentials to authenticate on your behalf. For that reason, you should add Segment as a “External Data Partner”  in DV360. This can be found under Advertiser Settings → Linked Accounts and then look for “Segment DMP” and add it.
 
 Segment is disabling all existing Personas Display and Video 360 destinations. You can still access your existing configuration, but please refrain from enabling the destination, as it is set to be deprecated. You will no longer be able to create new instances of Personas Display and Video 360.