Add instructions for replicating columns in DMS (#598)

* Add link about notifying Team Agnes

_articles/manage-50-50-state.md

@@ -30,6 +30,12 @@ The cases described below sound similar, but each situation has its own consider
 existing data.
 * After deploy (optional): Run the rake task to update existing data.
 * Deploy 2: Read from the table/field
+* **Optional**: If a new column is not PII and we want it to be available in the Data Warehouse:
+    * Add it to the [DMS config YML file][data-warehouse-config] in the devops repo
+    * Request a review from Team Agnes members (Data Enablement team). An easy way to notify the team
+      is to leave a link to the PR/MR in [#login-team-agnes-pull-requests][team-agnes-pulls]
+
+[team-agnes-pulls]: https://gsa.enterprise.slack.com/archives/C06EQPURK6D
 
 ### Remove a table or field
 * Deploy 1: Remove all reads in the code
@@ -47,6 +53,9 @@ existing data.
 * Deploy 3: Remove the table/field
     * If removing a field, the field can be removed from the ignored columns list
     * If removing a table, the entire model file can be removed
+* Devops Repo: Check if the table/column was replicated to the Data Warehouse via DMS (check the [DMS config YML file][data-warehouse-config]) and make a PR to remove.
+
+[data-warehouse-config]: https://gitlab.login.gov/lg/identity-devops/-/blob/main/terraform/app/dms-filter-columns-transformation-rules.yml
 
 [idp-explicit-config]: https://github.com/18F/identity-idp/blob/c4a0cc098867a209f8196c312024b24001b6fa9b/app/models/application_record.rb#L6-L7