Free/Busy Cloud User cannot see F/B of On Premise

On-Premises user cannot see cloud user's Free/busy On which version of Exchange is the on-premises users' mailbox located? Exchange 2003 Exchange 2007 Exchange 2010 Exchange 2013 3 Exchange 2010/2013 user cannot see cloud user's free/busy Log on to an on-premises user's mailbox and then try to view the Free/Busy for another on-premises user. This test is to verify that you do not have any issues with availability information retrieval within your on-premises environment.  Were you able to see the Free/busy information? Yes No 4 On-premises user cannot see cloud user's Free/busy Determine what error message you are receiving from OWA. Use the affected user's account to...

Does Free/busy work on-premises? Log on to an on-premises user's mailbox and then try to view the Free/Busy for another on-premises user. This test is to verify that you do not have any issues with availability information retrieval within your on-premises environment. Were you able to see the Free/busy information? Yes No 3 Cloud user cannot see On-premises user’s Free/Busy Use the following methods to verify that Autodiscover can be resolved from an external source and that the Firewall is open. Method one: Verify that Autodiscover is resolving to the on-premises Exchange CAS server From an external computer, open Command Prompt and type the following commands and press ENTER after each command: NSLookup autodiscover.< Your_Domain.com > In the response to the command, the "Address"value should be the external IP of the on-premises Exchan...