[Posting on behalf of Sudip (my engineering team) who answered the query]
>>1. Is it possible to see in any log if there is an email send to a user?
Quota breach message gets logged into ocumserver.log only when debug level is enabled.
>>2. When i change a quota setting on the controller, when will it be available on the AIQ Manager? After 15 Minutes?
Yes, next monitoring cycle should have the change, after 15 mins.
>>3. How to configure how often a client is informed about the quota hit, soft or hard?
When the Quota breach event is generated, notification is sent to the user. I am not sure about setting the frequency of quota email.
-Ashish