Autodiscover Exchange Server 2007 and 2013 Coexistence

Hello

We are having some issues where some users are not being notified when their mailbox is being migrated to E2013.

Before 2013, we never had a load balanced solution for CAS in Exchange Server 2007 or a single name space.

Below is our current config


AutoDiscoverServiceCN          : Server2K7CASpd
AutoDiscoverServiceClassName   : ms-Exchange-AutoDiscover-Service
AutoDiscoverServiceInternalUri : https://legacy.domain.int/Autodiscover/Autodiscover.xml
AutoDiscoverServiceGuid        : 77378f46-2c66-4aa9-a6a6-3e7a48b19596
AutoDiscoverSiteScope          : {USChicago, UKLondon, SGSingapore}

AutoDiscoverServiceCN          : Server2k7CASdr
AutoDiscoverServiceClassName   : ms-Exchange-AutoDiscover-Service
AutoDiscoverServiceInternalUri : https://legacy.domain.int/Autodiscover/Autodiscover.xml
AutoDiscoverServiceGuid        : 77378f46-2c66-4aa9-a6a6-3e7a48b19596
AutoDiscoverSiteScope          : {USChicago, UKLondon, SGSingapore}

AutoDiscoverServiceCN          : Server2013CASPD01
AutoDiscoverServiceClassName   : ms-Exchange-AutoDiscover-Service
AutoDiscoverServiceInternalUri : https://autodiscover.domain.int/autodiscover/autodiscover.xml
AutoDiscoverServiceGuid        : 77378f46-2c66-4aa9-a6a6-3e7a48b19596
AutoDiscoverSiteScope          : {UKLondon}

AutoDiscoverServiceCN          : Server2013CASPD02
AutoDiscoverServiceClassName   : ms-Exchange-AutoDiscover-Service
AutoDiscoverServiceInternalUri : https://autodiscover.domain.int/autodiscover/autodiscover.xml
AutoDiscoverServiceGuid        : 77378f46-2c66-4aa9-a6a6-3e7a48b19596
AutoDiscoverSiteScope          : {UKLondon}

AutoDiscoverServiceCN          : Server2013CASDR02
AutoDiscoverServiceClassName   : ms-Exchange-AutoDiscover-Service
AutoDiscoverServiceInternalUri : https://autodiscover.domain.int/autodiscover/autodiscover.xml
AutoDiscoverServiceGuid        : 77378f46-2c66-4aa9-a6a6-3e7a48b19596
AutoDiscoverSiteScope          : {UKLondon}

AutoDiscoverServiceCN          : Server2013CASDR01
AutoDiscoverServiceClassName   : ms-Exchange-AutoDiscover-Service
AutoDiscoverServiceInternalUri : https://autodiscover.domain.int/autodiscover/autodiscover.xml
AutoDiscoverServiceGuid        : 77378f46-2c66-4aa9-a6a6-3e7a48b19596
AutoDiscoverSiteScope          : {UKLondon}

I believe that we should change the AutoDiscoverServiceInternalUri on the two 2007 CAS to ALSO be the same as our 2013 CAS.

We know that when Outlook is opened, Autodiscover will respond with any of the 6 available CAS, and we think that those Outlook clients that are misconfigured, are those that are not getting notified when their Mailbox is moved to E2013.

Thanks