Update frequently-asked-questions.yml

As discussed in https://portal.microsofticm.com/imp/v3/incidents/incident/457894864/summary

Author: cogran

articles/network-watcher/frequently-asked-questions.yml

@@ -163,6 +163,13 @@ sections:
         answer: |
           There's no protocol selection option in connection monitor (classic). Tests in connection monitor (classic) only use the TCP protocol, and that's why, during the migration, we create a TCP configuration in tests in the new connection monitor.
 
+      - question: |
+          Are there current limitations to using AMA and Arc Agents with connection monitor?
+        answer: |
+          There is currently a regional boundary when an endpoint uses AMA and Arc agents with the associated log analytics workspace. As a result, this requires the associated log analytics workspace to be in the same region as the Arc endpoint. Data ingested into individual workspaces can be unionized for a single view, see [Query data across Log Analytics workspaces, applications, and resources in Azure Monitor](..azure-monitor/logs/cross-workspace-query.md).
+          
+          
+
   - name: Flow logs
     questions:
       - question: |