"The mailbox that was requested doesn't support the specified RequestServerVersion" Exchange Synchronization error during User Synchronization phase

SYMPTOMS

The following message is logged at ERROR level during the User Synchronization phase:

Folder Root was not found in <EMAILADDRESS@DOMAIN.COM>: Microsoft.Exchange.WebServices.Data.ServiceResponseException: The mailbox that was requested doesn't support the specified RequestServerVersion.
   at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.ProcessWebException(WebException webException)
   at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.GetEwsHttpWebResponse(IEwsHttpWebRequest request)
   at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.ValidateAndEmitRequest(IEwsHttpWebRequest& request)
   at Microsoft.Exchange.WebServices.Data.MultiResponseServiceRequest`1.Execute()
   at Microsoft.Exchange.WebServices.Data.ExchangeService.BindToFolder[TFolder](FolderId folderId, PropertySet propertySet)
   at Microsoft.Exchange.WebServices.Data.Folder.Bind(ExchangeService service, WellKnownFolderName name)
   at ZyLAB.EDiscovery.Exchange.Standalone.ExchangeSync.EwsFolderManager.GetFolderWithSubfolders(WellKnownFolderName wellKnownFolder, Boolean ignoreErrors)

CAUSE

The Exchange version ZyLAB Exchange Synchronization service that has been configured to use doesn't match the version of Exchange where the users mailbox reside.

RESOLUTION

Follow these steps to confirm the version of Exchange the ZyLAB Exchange Synchronization service is currently configured to use.

1. Open "C:\Program Files (x86)\ZyLAB\EDiscovery\Synchronization\Exchange\ExchangeService\ZyLAB.EDiscovery.Exchange.Standalone.WinService.exe.config" (default path) with a text editor.
2. Find the ExchangeVersion key.

Acceptable values for the "ExchangeVersion" key are: Exchange2010, Exchange2010_SP1, Exchange2010_SP2, or Exchange2013.

Please note that in mixed mode Exchange scenarios, where multiple Exchange versions coexist during a migration phase, the lowest Exchange version should be used in the "ExchangeVersion" key.
i.e. In a mixed mode implementation where Exchange 2010 SP3 and Exchange 2013 SP1 CU5 coexist, "ExchangeVersion" should be set to 'Exchange2010_SP2'.

APPLIES TO

3.7; 3.7 Service Pack 1