added Troubleshooting section for Azure VM (#5669)

* added Troubleshooting section for Azure VM

* Update azure-virtual-machine.md

* updated Troubleshooting section

---------

Co-authored-by: Amee Lepcha <[email protected]>

Author: sachin-sumologic

docs/integrations/microsoft-azure/azure-virtual-machine.md

@@ -178,3 +178,11 @@ import AppUpdate from '../../reuse/apps/app-update.md';
 import AppUninstall from '../../reuse/apps/app-uninstall.md';
 
 <AppUninstall/>
+
+## Troubleshooting
+
+### App installation failed - Content install error - Rule with name AzureObservabilityMetadataExtractionVMName already exists.
+
+This error occurs if the app being installed attempts to create a Metric Rule by a name (AzureObservabilityMetadataExtractionVMName) which already exists in the org. This Metric Rule could have been created manually and is creating conflict with current app installation flow.
+
+To resolve the issue, delete the existing Metric Rule (AzureObservabilityMetadataExtractionVMName) and reinstall the app.

docs/integrations/microsoft-azure/azure-virtual-network.md

@@ -300,9 +300,9 @@ import AppUninstall from '../../reuse/apps/app-uninstall.md';
 
 ### App installation failed - Content Error - Invalid Field Extraction Rule
 
-This error is encountered if the app which is being installed is trying to create an FER by a name which already exists as an FER in the org. This FER could have been created manually or through some other app.
+This error occurs if the app being installed attempts to create an FER by a name (AzureVirtualNetworkTargetResourceIdExtractionFER) which already exists in the org. This FER could have been created manually and is creating conflict with current app installation flow.
 
-To resolve the problem, rename or delete the existing FER and try reinstalling the app.
+To resolve the issue, rename or delete the existing FER (AzureVirtualNetworkTargetResourceIdExtractionFER) and reinstall the app.
 
 ### HTTP Logs and Metrics Source used by Azure Functions