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floridait
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Two-node Exchange 2019 DAG with many 4999 event ID errors
Hello, We are running a two-node Exchange 2019 DAG behind a Kemp LB. Since the Feb CU and SU updates, I've seen continuous 4999 errors in the Event Viewer. Error 1: Watson report about to be sent for process id: 18868, with parameters: E12, c-RTL-AMD64, 15.02.1118.026, w3wp#MSExchangeSyncAppPool, MSExchange ActiveSync, Microsoft.Exchange.AirSync.Common.SchemaConverter.Entity.EntityContentProperty.get_MIMEData, UnexpectedCondition:NotImplementedException, 76de, 15.02.1118.026. ErrorReportingEnabled: True exData=|exHResult=|exStacktrace=at Microsoft.Exchange.AirSync.Common.SchemaConverter.Entity.EntityContentProperty.get_MIMEData() at Microsoft.Exchange.AirSync.Common.SchemaConverter.AirSync.AirSyncContentProperty.InternalCopyFrom(IProperty sourceProperty) at Microsoft.Exchange.AirSync.Common.SchemaConverter.AirSync.AirSyncContent14Property.InternalCopyFrom(IProperty sourceProperty) at Microsoft.Exchange.AirSync.Common.SchemaConverter.AirSync.FlexibleSchemaStrategy.ExecuteCopyProperty(IProperty srcProperty, AirSyncProperty dstAirSyncProperty) at Microsoft.Exchange.AirSync.Common.SchemaConverter.AirSync.AirSyncDataObject.CopyFrom(IProperty srcRootProperty) at Microsoft.Exchange.AirSync.MailboxItemFetchProvider.BuildResponse(XmlNode responseNode)|exTargetSite=MSExchange ActiveSync Microsoft.Exchange.AirSync.Common.SchemaConverter.Entity.EntityContentProperty.get_MIMEData|exSource=|exMessage=|exComplete= Error 2: Watson report about to be sent for process id: 19480, with parameters: E12IIS, c-RTL-AMD64, 15.02.1118.026, w3wp#MSExchangeOWAAppPool, M.E.C.Owa2.Server, M.E.C.O.S.C.OwaMapiNotificationManager.SubscribeToSuiteNotification, System.NotSupportedException, 80d2-dumptidset, 15.02.1118.026. ErrorReportingEnabled: True Error 3: Watson report about to be sent for process id: 27204, with parameters: E12IIS, c-RTL-AMD64, 15.02.1118.026, w3wp#MSExchangeServicesAppPool, M.Exchange.Services, M.E.S.C.T.ServiceResult`1.ProcessServiceResults, System.ArgumentNullException, feb4-dumptidset, 15.02.1118.026. ErrorReportingEnabled: True I've tried the following to resolve the issue: 1. run a .NET repair. 2. Recycle AppPools 3. Checked that OAuth is valid 4. Make sure that all certificates are valid 5. confirm virtual directories have the correct FQDN 6. multiple reboots I haven't received any connection issues besides a few of Outlook autodiscover redirect popups. Open to any suggestions.3.2KViews0likes4Comments
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