Merge pull request #3634 from segmentio/DOC-597-engage-sources-beta-content

Add Engage Source Content [DOC-597]

Author: pwseg

src/engage/user-subscriptions/engage-sources.md

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+---
+title: Engage Events Source
+plan: engage-foundations
+hidden: true
+---
+
+> info ""
+> The Engage Events Source is in beta.
+
+Use the Engage Events Source to sync Engage subscription states to your downstream warehouses.
+
+## Update downstream subscription states
+
+With Twilio Engage, you can [set and update user subscription states](/docs/engage/user-subscriptions/set-user-subscriptions/) with a [CSV file upload](/docs/engage/profiles/csv-upload/) or, programmatically, [using Segment APIs](/docs/engage/user-subscriptions/set-user-subscriptions/#manage-user-subscriptions-with-segment-apis).
+
+As part of Engage, Segment creates an Engage Events Source that lets you sync these subscription states [to warehouses Destinations](/docs/connections/storage/warehouses/). When a subscription state changes, Segment sends an update to the warehouse. As a result, the subscription states stored in your data warehouse(s) can serve as a single source of truth for managing user consent in other tools that you may have connected to your warehouse.
+
+## Working with Engage Events Sources
+
+Segment generates Engage Sources automatically. If you're using Engage, you can find the Source in your Segment space by navigating to **Connections > Sources**. Segment sets a `Generated` status to Engage Sources in the Statuses column of the **My Sources** table.
+
+From the **My Sources** table, you can select the Engage Source to add a warehouse Destination and configure the Source's settings. If you have more than one Engage space, Segment creates a separate Source for each space.