Updated metric description

Author: yossi-y

articles/azure-monitor/logs/logs-data-export.md

@@ -132,7 +132,7 @@ The following metrics are available for data export operation and alerts
 | Metric name	| Description |
 |:---|:---|
 | Bytes Exported | Total number of bytes exported to destination from Log Analytics workspace within the selected time range. The size of data exported is the number of bytes in the exported JSON formatted data. 1 GB = 10^9 bytes. |
-| Export Failures	| Total number of failed export requests to destination from Log Analytics workspace within the selected time range. This number includes export failures due to destination resource throttling, server error or access forbidden error. |
+| Export Failures	| Total number of failed export requests to destination from Log Analytics workspace within the selected time range. This number includes export attempts failures due to destination resource throttling, forbidden access error, or any server error. A retry process handles failed attempts and the number isn’t an indication for missing data. |
 | Records exported | Total number of records exported from Log Analytics workspace within the selected time range. This number counts records for operations that ended with success. |