Merge pull request #19635 from MashaMSFT/fixes

Fixes

Author: v-albemi

docs/relational-databases/replication/transactional/bidirectional-transactional-replication.md

@@ -22,6 +22,9 @@ monikerRange: "=azuresqldb-mi-current||>=sql-server-2016"
   Bidirectional transactional replication is a specific transactional replication topology that allows two servers to exchange changes with each other: each server publishes data and then subscribes to a publication with the same data from the other server. The `@loopback_detection` parameter of [sp_addsubscription (Transact-SQL)](../../../relational-databases/system-stored-procedures/sp-addsubscription-transact-sql.md) is set to TRUE to ensure that changes are only sent to the Subscriber and do not result in the change being sent back to the Publisher.  
 
  In [!INCLUDE[ssVersion2005](../../../includes/ssversion2005-md.md)] and later versions, this topology is also supported by peer-to-peer transactional replication, but bidirectional replication can provide improved performance.  
+
+If you want to add a subscription to a bi-directional publication by using the  the fully-qualified domain name (FQDN), verify that the server name (`@@SERVERNAME`) of the subscriber returns the FQDN. If the subscriber server name does not return the FQDN, changes that originate from that subscriber may cause primary key violations. 
+
 
 ## See Also  
  [Peer-to-Peer Transactional Replication](../../../relational-databases/replication/transactional/peer-to-peer-transactional-replication.md)  

docs/toc.yml

@@ -1767,6 +1767,8 @@ items:
       href: relational-databases/graphs/sql-graph-sample.md
     - name: SHORTEST_PATH
       href: relational-databases/graphs/sql-graph-shortest-path.md
+    - name: Edge constraints
+      href: relational-databases/tables/graph-edge-constraints.md
   - name: Sequence numbers
     href: relational-databases/sequence-numbers/sequence-numbers.md
     items:
@@ -1888,8 +1890,6 @@ items:
         href: relational-databases/tables/use-column-sets.md
       - name: Table-Valued Parameters
         href: relational-databases/tables/use-table-valued-parameters-database-engine.md
-    - name: Edge constraints
-      href: relational-databases/tables/graph-edge-constraints.md
     - name: Primary keys
       href: relational-databases/tables/primary-and-foreign-key-constraints.md
       items: