Fiddler is showing an exception on the second account.
40d
Object reference not set to an instance of an object.
Stack Trace:
at MailService.Protocols.Properties.ContactPropertyReader.RetrieveAllPropertyValues()
at MailService.Protocols.MAPI.ServerHandles.FastTransferDownloadContext.FetchItem(Boolean isFai, UInt64 mid, Boolean restrictionChecked, db_folder_readonly dbFolder, Boolean& syncError)
at MailService.Protocols.MAPI.ServerHandles.FastTransferDownloadContext.FetchItemIfNeeded(db_folder_readonly dbFolder, MapiPropertyContext mapiPropertyContext)
at MailService.Protocols.MAPI.ServerHandles.FastTransferDownloadContext.GetBytes(Int32 maximumBufferSize, Boolean& done)
at MailService.Protocols.MAPI.Rops.FastTransferRops.RopFastTransferSourceGetBuffer.Process(FastTransferDownloadContext fastTransfer)
at MailService.Protocols.MAPI.Rops.FastTransferRops.RopFastTransferSourceGetBuffer.Process(List`1 payloadServerObjectHandleTable)
at MailService.Protocols.MAPI.RequestTypes.ExecuteRequest.Process()
at MailService.Protocols.MAPI.MapiProcessor.Process()
0
Exception in the mapi logs...
00:24:11.991 [{6DB9A068-A850-4B2E-A2EB-6290619D9E1F}:14] Exception: System.NullReferenceException: Object reference not set to an instance of an object.
at MailService.Protocols.Properties.ContactPropertyReader.RetrieveAllPropertyValues()
at MailService.Protocols.MAPI.ServerHandles.FastTransferDownloadContext.FetchItem(Boolean isFai, UInt64 mid, Boolean restrictionChecked, db_folder_readonly dbFolder, Boolean& syncError)
at MailService.Protocols.MAPI.ServerHandles.FastTransferDownloadContext.FetchItemIfNeeded(db_folder_readonly dbFolder, MapiPropertyContext mapiPropertyContext)
at MailService.Protocols.MAPI.ServerHandles.FastTransferDownloadContext.GetBytes(Int32 maximumBufferSize, Boolean& done)
at MailService.Protocols.MAPI.Rops.FastTransferRops.RopFastTransferSourceGetBuffer.Process(FastTransferDownloadContext fastTransfer)
at MailService.Protocols.MAPI.Rops.FastTransferRops.RopFastTransferSourceGetBuffer.Process(List`1 payloadServerObjectHandleTable)
at MailService.Protocols.MAPI.RequestTypes.ExecuteRequest.Process()
at MailService.Protocols.MAPI.MapiProcessor.Process()