Hi chetan,
Now i am applying policy using GCM.. but server logs show following error:
ONS1010: Error sending GCM message to client, "a1bcxxaxxxxxxxxx", with Client GUID, "{5Cxxxxxx-8xxx-3xxx-8xxx-A9xxxxxxxxxx}". The request failed with GCM message: Fail - GCM Service Not Available.
I have selected the GCM in configuration, and added the key and project id which i had created .
In Enrollment configuration selected the GCM PROJECT ID.