Update azure-stack-edge-alerts.md

Add error of missing MSI roles

Author: GeorgeH-MS

articles/databox-online/azure-stack-edge-alerts.md

@@ -150,6 +150,8 @@ The following alerts are for issues that occur when accessing or uploading data
 |Could not connect to the storage account '{0}'.<sup>*</sup> |Critical |This may be due to Internet connectivity issues. The device is not able to communicate with the storage account service. In the local web UI of the device, go to **Troubleshooting** > **Diagnostic tests** and click **Run diagnostic tests**. Resolve the reported issues. |
 |The device has {0} files. A maximum of {1} files are supported. |Critical |Consider deleting some files from the device. |
 |Low throughput to and from Azure Storage detected. |Warning  |In the local web UI of the device, go to **Troubleshooting** > **Diagnostic tests** and click **Run diagnostic tests**. Resolve the reported issues. If the issue persists, [contact Microsoft Support](azure-stack-edge-contact-microsoft-support.md). |
+|File share creation fails with insufficient permissions for cloud storage gateway. |Critical |This could happen when the Azure Storage account does not have appropriate permissions assigned for the Azure Stack Edge managed identity for the data tiering.<br>You can manually assign the following roles to the Managed identities for Azure Stack Edge resource:<ol><li>Storage Blob Data Contributor</li><li>Storage File Data Privileged Contributor</li><li>Contributor</li></ol>For more information, see [Assign an Azure role for access to blob data](../storage/blobs/assign-azure-role-data-access.md?tabs=portal#assign-an-azure-role) |
+|Storage account creation fails with insufficient permissions for cloud storage gateway. |Critical |This could happen when the Azure Storage account does not have appropriate permissions assigned for the Azure Stack Edge managed identity for the data tiering.<br>You can manually assign the following roles to the Managed identities for Azure Stack Edge resource:<ol><li>Storage Blob Data Contributor</li><li>Storage File Data Privileged Contributor</li><li>Contributor</li></ol>For more information, see [Assign an Azure role for access to blob data](../storage/blobs/assign-azure-role-data-access.md?tabs=portal#assign-an-azure-role) |
 
 <sup>*</sup> This alert is triggered by more than one event type, with different recommended actions.