We have Exchange 2003 on-premise
We have a Hybrid 2010 server
Currently Cloud users CAN see free busy for 2010 and 2003
Currently 2010 CAN see free busy for cloud and 2003
Currently 2003 can NOT see free busy for Cloud
I'm working with Microsoft but they keep looking at the cloud configuration and it's working between that and 2010 so I'm wondering if anyone else had any suggestions.