Add excessive identity calls

Author: PatAltimore

articles/iot-edge/troubleshoot-common-errors.md

@@ -177,6 +177,20 @@ The IoT Edge agent module doesn't have permissions to access a module's image.
 
 Make sure that your container registry credentials are correct your device deployment manifest.
 
+### IoT Edge agent making excessive identity calls
+
+#### Symptoms
+
+IoT Edge agent to make excessive identity calls to Azure IoT Hub.
+
+#### Cause
+
+Misconfiguration of the device deployment manifest causes an unsuccessful deployment. IoT Edge Agent retry logic continues to retry deployment. Each retry makes identity calls.
+
+#### Solution
+
+Verify the deployment manifest.
+
 ### IoT Edge hub fails to start
 
 #### Symptoms