diff --git a/app/plugins/Transmogrify/config/schema/tables.json b/app/plugins/Transmogrify/config/schema/tables.json
index d4103fba..26872e5e 100644
--- a/app/plugins/Transmogrify/config/schema/tables.json
+++ b/app/plugins/Transmogrify/config/schema/tables.json
@@ -591,5 +591,20 @@
             "eppn_suffix": null,
             "org_identity_source_id": "external_identity_source_id"
         }
+    },
+    "ext_identity_source_records": {
+        "source": "cm_org_identity_source_records",
+        "displayField": "id",
+        "cache": ["org_identity_id", "sorid"],
+        "preRow": "findAdoptedPersonByLinkedOrgIdentityId",
+        "fieldMap": {
+            "org_identity_source_id": "external_identity_source_id",
+            "sorid": "source_key",
+            "org_identity_id": "external_identity_id",
+            "co_petition_id": null,
+            "co_person_id": "adopted_person_id",
+            "reference_identifier": "reference_identifier",
+            "org_identity_source_record_id": "ext_identity_source_record_id"
+        }
     }
 }
diff --git a/app/plugins/Transmogrify/src/Lib/Traits/TypeMapperTrait.php b/app/plugins/Transmogrify/src/Lib/Traits/TypeMapperTrait.php
index 47b15b49..cfd6512e 100644
--- a/app/plugins/Transmogrify/src/Lib/Traits/TypeMapperTrait.php
+++ b/app/plugins/Transmogrify/src/Lib/Traits/TypeMapperTrait.php
@@ -113,6 +113,46 @@ trait TypeMapperTrait
     'dateOfBirth' => '',
   ];
 
+
+  /**
+   * Find and set adopted person ID based on linked external/org identity ID
+   *
+   * Attempts to find the associated CO Person ID using either external_identity_id
+   * or org_identity_id from either original or current row data. If found, updates
+   * the co_person_id in the original row.
+   *
+   * @param array &$origRow Original row data by reference
+   * @param array &$row Current row data by reference
+   * @return void
+   * @throws Exception
+   * @since COmanage Registry v5.2.0
+   */
+  protected function findAdoptedPersonByLinkedOrgIdentityId(array &$origRow, array &$row): void
+  {
+    // Try to locate an external identity (or legacy org identity) id from either array
+    $externalIdentityId = null;
+
+    if (!empty($row['external_identity_id'])) {
+      $externalIdentityId = (int)$row['external_identity_id'];
+    } elseif (!empty($origRow['org_identity_id'])) {
+      $externalIdentityId = (int)$origRow['org_identity_id'];
+    } elseif (!empty($row['org_identity_id'])) {
+      $externalIdentityId = (int)$row['org_identity_id'];
+    }
+
+    $personId = null;
+
+    if ($externalIdentityId !== null) {
+      $personId = $this->mapOrgIdentityCoPersonId(['id' => $externalIdentityId]);
+    }
+
+
+    $row['co_person_id'] = null;
+    if ($personId !== null) {
+      $row['co_person_id'] = $personId;
+    }
+  }
+
   /**
    * Map address type to corresponding type ID
    *