Merge pull request #268290 from mahipdeora/patch-35

Update cross-region-overview.md

Author: prmerger-automator[bot]

articles/load-balancer/cross-region-overview.md

@@ -158,6 +158,8 @@ Cross-region load balancer routes the traffic to the appropriate regional load b
 
 * Outbound rules aren't supported on Cross-region Load Balancer. For outbound connections, utilize [outbound rules](./outbound-rules.md) on the regional load balancer or [NAT gateway](../nat-gateway/nat-overview.md).
 
+* Regional load balancers can't be upgraded to the global tier. Only new load balancers can be created as the global tier. 
+
 ## Pricing and SLA
 Cross-region load balancer shares the [SLA](https://azure.microsoft.com/support/legal/sla/load-balancer/v1_0/) of standard load balancer.