In some environments, there may be intermittent issues with free busy requests from Exchange to Domino direction and you may see "There server was busy" and the following error in EWS.log file on CMN server:
ERROR QuestEWSService - GetUserAvailability()
System.ServiceModel.CommunicationException: The maximum message size quota for incoming messages (65536) has been exceeded. To increase the quota, use the MaxReceivedMessageSize property on the appropriate binding element. ---> System.ServiceModel.QuotaExceededException: The maximum message size quota for incoming messages (65536) has been exceeded. To increase the quota, use the MaxReceivedMessageSize property on the appropriate binding element.
--- End of inner exception stack trace ---
1- Go to C:\Program Files (x86)\Quest Software\Quest Coexistence Manager for Notes\Free Busy Connector\EWS
2- Open web.config
3- Look for <binding name="FreeBusyClientSettings" openTimeout="00:01:00" receiveTimeout="00:01:00" sendTimeout="00:01:00" closeTimeout="00:01:00">
4- Add maxReceivedMessageSize="524288"
5- Save and close
6- Restart CMN FreeBusy Services
