diff --git a/persistence/azure-table/index.md b/persistence/azure-table/index.md
index 7c3f2d1c497..4e3e31955b9 100644
--- a/persistence/azure-table/index.md
+++ b/persistence/azure-table/index.md
@@ -51,4 +51,11 @@ partial: saga-property-types
 Saga correlation property values are subject to the underlying Azure Storage table `PartitionKey` and `RowKey` restrictions:
 
 * Up to 1KB in size
-* Cannot contain [invalid characters](https://docs.microsoft.com/en-us/rest/api/storageservices/Understanding-the-Table-Service-Data-Model#tables-entities-and-properties)
\ No newline at end of file
+* Cannot contain [invalid characters](https://docs.microsoft.com/en-us/rest/api/storageservices/Understanding-the-Table-Service-Data-Model#tables-entities-and-properties)
+
+## Outbox
+
+### Storage format
+
+> [!WARNING]
+> The default partition key, when not explicitly set, does not separate Outbox rows by endpoint name. Because of that, multiple logical endpoints cannot share the same table since [message identities are not unique across endpoints from a processing perspective](/nservicebus/outbox/#message-identity). Either separate different endpoints into different tables or [override the partition key](transactions.md).