Lot of eventID 4999 related to ActiveSync on my Exchange Servers

Occasional Contributor

Hello all,

 

I'm Vincent and I'm Exchange administrator in my International Research Organization.

Our Exchange farm is composed of 4 Exchange Server 2016 Enterprise CU 22.

I recently noticed a lot of events with ID 4999 in the Application logs on all 4 servers like below:

Log Name: Application
Source: MSExchange Common
Date: 25/02/2022 15:09:28
Event ID: 4999
Task Category: General
Level: Error
Keywords: Classic
User: N/A
Computer: XXXXXX 
Description:
Watson report about to be sent for process id: 5560, with parameters: E12, c-RTL-AMD64, 15.01.2375.018, w3wp#MSExchangeSyncAppPool, MSExchange ActiveSync, Microsoft.Exchange.AirSync.Common.SchemaConverter.Entity.EntityContentProperty.get_MIMEData, UnexpectedCondition:NotImplementedException, 76de, 15.01.2375.018.
ErrorReportingEnabled: False
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=

 

However, none of our users using ActiveSync with their mobile complained so far. 

Did one of you already had similar problem?

6 Replies

Same ErrorID 4999 here, only with another processID (mostly 25636, but also others):

Watson report about to be sent for process id: 25636, with parameters: E12, c-RTL-AMD64, 15.01.2308.021, w3wp#MSExchangeSyncAppPool, MSExchange ActiveSync, Microsoft.Exchange.AirSync.Common.SchemaConverter.Entity.EntityContentProperty.get_MIMEData, UnexpectedCondition:NotImplementedException, 0, 15.01.2308.021.
ErrorReportingEnabled: True
exData=|exHResult=|exStacktrace=bei Microsoft.Exchange.AirSync.Common.SchemaConverter.Entity.EntityContentProperty.get_MIMEData()
bei Microsoft.Exchange.AirSync.Common.SchemaConverter.AirSync.AirSyncContentProperty.InternalCopyFrom(IProperty sourceProperty)
bei Microsoft.Exchange.AirSync.Common.SchemaConverter.AirSync.AirSyncContent14Property.InternalCopyFrom(IProperty sourceProperty)
bei Microsoft.Exchange.AirSync.Common.SchemaConverter.AirSync.FlexibleSchemaStrategy.ExecuteCopyProperty(IProperty srcProperty, AirSyncProperty dstAirSyncProperty)
bei Microsoft.Exchange.AirSync.Common.SchemaConverter.AirSync.AirSyncDataObject.CopyFrom(IProperty srcRootProperty)
bei Microsoft.Exchange.AirSync.MailboxItemFetchProvider.BuildResponse(XmlNode responseNode)|exTargetSite=MSExchange ActiveSync Microsoft.Exchange.AirSync.Common.SchemaConverter.Entity.EntityContentProperty.get_MIMEData|exSource=|exMessage=|exComplete=

 

Everything started on 13.2.2022 with EventID 4999 but other message within:

Watson report about to be sent for process id: 16564, with parameters: E12IIS, c-RTL-AMD64, 15.01.2308.014, w3wp#MSExchangeOWAAppPool, M.E.C.Owa2.Server, M.E.C.O.S.C.OwaMapiNotificationManager.SubscribeToSuiteNotification, System.NotSupportedException, 80d2-dumptidset, 15.01.2308.014.
ErrorReportingEnabled: True

 

Over 160 views in this thread but no solution or at least a hint?

I have exactly the same issue. Would be nice somebody will pick this topic up :\

+ System 
  - Provider 
   [ Name]  MSExchange Common 
   - EventID 4999 
   [ Qualifiers]  16388 
    Level 2 
 Task 1 
    Keywords 0x80000000000000 
   - TimeCreated 
   [ SystemTime]  2022-03-29T12:33:41.592563000Z 
    EventRecordID 32720269 
    Channel Application 
    Computer rock.Genedata.win 
    Security 
 - EventData 
   23208 
   E12 
   c-RTL-AMD64 
   15.01.2308.021 
   w3wp#MSExchangeSyncAppPool 
   MSExchange ActiveSync 
   Microsoft.Exchange.AirSync.Common.SchemaConverter.Entity.EntityContentProperty.get_MIMEData 
   UnexpectedCondition:NotImplementedException 
   76de 
   15.01.2308.021 
   True 
   False 
   w3wp#MSExchangeSyncAppPool 
   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= 

Hi @BroBias7  and @BalticNative  ,

Which version of Exchange do you have?
On my side I verified all monitoring probes on all of my servers as explained here: https://docs.microsoft.com/en-us/exchange/management/health/troubleshooting-activesync-health-set
None of them report any error. ActiveSync is working properly and no user complained.
I think that we will have to live with it ...

@VincentBurle83 

 

I'm seeing the same exact errors with Exchange 2016 CU22.  I recently upgraded to CU22 with the naive optimism that it would be resolved with that CU but no dice.  Has anyone else found a fix for these errors?  I'm not getting any complaints but if that AppPool is indeed crashing and restarting repeatedly through the day I can't imagine that's a good thing.

Same issue here with MSExchangeSyncAppPool, crashing & recycling 100-120 times a day without a followable reason. Would be nice to get some experience exchange on troubleshooting this :\ ...
@VincentBurle83
Sry, have 2 similar accounts here :D
Yes, i can confirm this as well. ActiveSync is healthy in general. However, i also discovered a bunch of 1040 events which result of conflicts between http(s)_responses for heartbeat intervalls. timeout on FW is lower than on EXCH which results in 1040 events and maybe connection overloads on the MSEchangeSyncAppPool which then results in 4999 -> recycling.

My best logical conclusion at the moment. However, i cannot adapt http_response_timeout on our fw only for a dedicated target (activesync-url) and it's not an option to change this for entire http_proxy.

Any help is welcome ^^