diff --git a/source/packages/@aws-accelerator/accelerator/lib/lambdas/validate-environment/index.ts b/source/packages/@aws-accelerator/accelerator/lib/lambdas/validate-environment/index.ts
index 0661d4be2..e23a68dae 100644
--- a/source/packages/@aws-accelerator/accelerator/lib/lambdas/validate-environment/index.ts
+++ b/source/packages/@aws-accelerator/accelerator/lib/lambdas/validate-environment/index.ts
@@ -266,7 +266,8 @@ export async function handler(event: AWSLambda.CloudFormationCustomResourceEvent
             name: parsedDataBag['name'],
             email: account['acceleratorKey'],
             description: parsedDataBag['description'],
-            organizationalUnitId: await getOuName(account['ouName']),
+            // formatting for CT requirements to support nested ou's
+            organizationalUnitId: (await getOuName(account['ouName'])) + ` (${accountOu.awsKey})`,
           };
           const params: PutCommandInput = {
             TableName: newCTAccountsTableName,