migrate concepts

Author: Ankita Dutta

articles/site-recovery/toc.yml

@@ -100,9 +100,7 @@
     - name: Move Azure VMs between Government & Public regions
       href: region-move-cross-geos.md
     - name: Move a vault to a different region
-      href: move-vaults-across-regions.md
-    - name: Migrate to availability zone support
-      href: ../availability-zones/migrate-recovery-services-vault.md      
+      href: move-vaults-across-regions.md      
   - name: Migrate to Azure
     items:
     - name: Prepare Azure for on-premises replication
@@ -203,6 +201,12 @@
       href: concepts-public-ip-address-with-site-recovery.md
   - name: About recovery plans
     href: recovery-plan-overview.md
+  - name: Migrate
+    items:
+    - name: Migrate to Azure
+      href: migrate-overview.md
+    - name: Migration to availability zones 
+      href: ../availability-zones/migrate-recovery-services-vault.md     
   - name: Security
     items:
     - name: Security baseline
@@ -217,8 +221,6 @@
     href: concepts-types-of-failback.md
   - name: Multitenant support for VMware disaster recovery
     href: vmware-azure-multi-tenant-overview.md
-  - name: About migration to Azure
-    href: migrate-overview.md
   - name: About role-based access control with Site Recovery
     href: site-recovery-role-based-linked-access-control.md
 - name: How-to Guides