diff --git a/src/4.3_to_5.0/__snapshots__/migrateSettingsFolder.test.ts.snap b/src/4.3_to_5.0/__snapshots__/migrateSettingsFolder.test.ts.snap
index 7136cc4e..2b6527d3 100644
--- a/src/4.3_to_5.0/__snapshots__/migrateSettingsFolder.test.ts.snap
+++ b/src/4.3_to_5.0/__snapshots__/migrateSettingsFolder.test.ts.snap
@@ -97,7 +97,7 @@ exports[`migrateSettingsFolder returns the folders corresponding to the converte
           },
           "settings": {
             "entry": {
-              "content": "{"userFilters.areEnabled":false}",
+              "content": "{"userFilters.areEnabled":false,"drillthrough.defaultSelectedColumns":{"MarketRiskCube":["riskCurrency","subTradeId","EntityName"],"SecondCube":["delta"]}}",
               "owners": [
                 "user1",
               ],
diff --git a/src/4.3_to_5.0/__snapshots__/migrate_43_to_50.test.ts.snap b/src/4.3_to_5.0/__snapshots__/migrate_43_to_50.test.ts.snap
index 10fab4a8..9dfbda93 100644
--- a/src/4.3_to_5.0/__snapshots__/migrate_43_to_50.test.ts.snap
+++ b/src/4.3_to_5.0/__snapshots__/migrate_43_to_50.test.ts.snap
@@ -1277,7 +1277,7 @@ exports[`migrate_43_to_50 returns a valid ActiveUI5 /ui folder on a real life in
             },
             "settings": {
               "entry": {
-                "content": "{"userFilters.areEnabled":false}",
+                "content": "{"userFilters.areEnabled":false,"drillthrough.defaultSelectedColumns":{"MarketRiskCube":["riskCurrency","subTradeId","EntityName"],"SecondCube":["delta"]}}",
                 "owners": [
                   "user1",
                 ],
@@ -2420,7 +2420,7 @@ exports[`migrate_43_to_50 returns a valid ActiveUI5 /ui folder on a small input
             },
             "settings": {
               "entry": {
-                "content": "{"theme":"dark-activeviam","search.maxResults":10,"userFilters.areEnabled":true}",
+                "content": "{"theme":"dark-activeviam","search.maxResults":10,"userFilters.areEnabled":true,"drillthrough.defaultSelectedColumns":{"EquityDerivativesCube":["delta","gamma","pnlVega","Desk","Currency","Date","HostName"],"EquityDerivativesCubeDist":["BumpedMtmDown","ProductQtyMultiplier","vega","rho","productId","pnlVega","pnlDelta","pnl","gamma","delta","TradeId","ProductBaseMtm"]}}",
                 "owners": [
                   "admin",
                 ],
diff --git a/src/4.3_to_5.0/legacySettingsFolder.ts b/src/4.3_to_5.0/legacySettingsFolder.ts
index 179326a9..f2ac97af 100644
--- a/src/4.3_to_5.0/legacySettingsFolder.ts
+++ b/src/4.3_to_5.0/legacySettingsFolder.ts
@@ -14,6 +14,58 @@ const user1Preferences = {
   deny: [],
   map: {
     "userFilters.enabled": true,
+    "widgets.Tabular.drillthrough.selectedColumns": {
+      "https://activerisk.zone1.scb.net:8081/server": {
+        MarketRiskCube: [
+          {
+            functionName: "MemberValue",
+            columnName: "riskCurrency",
+          },
+          {
+            functionName: "Caption",
+            columnName: "riskCurrency",
+          },
+          {
+            functionName: "MemberValue",
+            columnName: "subTradeId",
+          },
+          {
+            functionName: "Caption",
+            columnName: "subTradeId",
+          },
+        ],
+        SecondCube: [
+          {
+            functionName: "MemberValue",
+            columnName: "delta",
+          },
+          {
+            functionName: "Caption",
+            columnName: "delta",
+          },
+        ],
+      },
+      "https://second-server.com": {
+        MarketRiskCube: [
+          {
+            functionName: "MemberValue",
+            columnName: "subTradeId",
+          },
+          {
+            functionName: "Caption",
+            columnName: "subTradeId",
+          },
+          {
+            functionName: "MemberValue",
+            columnName: "EntityName",
+          },
+          {
+            functionName: "Caption",
+            columnName: "EntityName",
+          },
+        ],
+      },
+    },
   },
 };
 
diff --git a/src/4.3_to_5.0/migrateSettingsFolder.ts b/src/4.3_to_5.0/migrateSettingsFolder.ts
index 82b7ec79..d5907147 100644
--- a/src/4.3_to_5.0/migrateSettingsFolder.ts
+++ b/src/4.3_to_5.0/migrateSettingsFolder.ts
@@ -1,5 +1,6 @@
 import _cloneDeep from "lodash/cloneDeep";
 import _mapValues from "lodash/mapValues";
+import _uniq from "lodash/uniq";
 import _pick from "lodash/pick";
 import type {
   Activity,
@@ -38,6 +39,43 @@ function migrateSettingsMap(legacySettingsMap: {
     migratedSettingsMap["userFilters.areEnabled"] = areUserFiltersEnabled;
   }
 
+  const legacyDrillthroughColumns:
+    | {
+        [serverUrl: string]: {
+          [cubeName: string]: {
+            functionName: "Value" | "Caption" | "MemberValue" | "MemberCaption";
+            columnName: string;
+          }[];
+        };
+      }
+    | undefined =
+    legacySettingsMap["widgets.Tabular.drillthrough.selectedColumns"];
+
+  if (legacyDrillthroughColumns !== undefined) {
+    const migratedDrillthroughColumns: Settings["drillthrough.defaultSelectedColumns"] =
+      {};
+    // The legacy settings are per server and per cube.
+    // The new ones are only per cube: the assumption is that no customer has multiple servers containing a cube with the same name but exposing a different data model.
+    for (const serverUrl in legacyDrillthroughColumns) {
+      for (const cubeName in legacyDrillthroughColumns[serverUrl]) {
+        if (migratedDrillthroughColumns[cubeName] === undefined) {
+          migratedDrillthroughColumns[cubeName] = [];
+        }
+        migratedDrillthroughColumns[cubeName].push(
+          ...legacyDrillthroughColumns[serverUrl][cubeName].map(
+            ({ columnName }) => columnName,
+          ),
+        );
+      }
+    }
+
+    // Remove duplicates.
+    migratedSettingsMap["drillthrough.defaultSelectedColumns"] = _mapValues(
+      migratedDrillthroughColumns,
+      _uniq,
+    );
+  }
+
   return migratedSettingsMap;
 }