The virtual directories that you are using to access Outlook Web Access could not register for message classification change notifications in Active Directory.

Microsoft.Exchange2007.Cas.MSExchangeOWA.51 (Rule)

Knowledge Base article:

External

For more information, see the respective topic at the Microsoft Exchange Server TechCenter

Element properties:

TargetMicrosoft.Exchange2007.ServerRole.Cas
CategoryEventCollection
EnabledTrue
Alert GenerateTrue
Alert SeverityWarning
Alert PriorityNormal
RemotableTrue
Alert Message
The virtual directories that you are using to access Outlook Web Access could not register for message classification change notifications in Active Directory.
{0}

Member Modules:

ID Module Type TypeId RunAs 
DS DataSource Microsoft.Exchange2007.Application.FilteredEventProvider.DS Default
GenerateAlert WriteAction System.Health.GenerateAlert Default

Source Code:

<Rule ID="Microsoft.Exchange2007.Cas.MSExchangeOWA.51" Enabled="onEssentialMonitoring" Target="ExLibrary!Microsoft.Exchange2007.ServerRole.Cas" ConfirmDelivery="true" Remotable="true" Priority="Normal" DiscardLevel="100">
<Category>EventCollection</Category>
<DataSources>
<DataSource ID="DS" TypeID="ExDiscovery!Microsoft.Exchange2007.Application.FilteredEventProvider.DS">
<EventSourceName>MSExchange OWA</EventSourceName>
<EventDisplayNumber>51</EventDisplayNumber>
</DataSource>
</DataSources>
<WriteActions>
<WriteAction ID="GenerateAlert" TypeID="Health!System.Health.GenerateAlert">
<Priority>1</Priority>
<Severity>1</Severity>
<AlertOwner>$Data/PublisherName$</AlertOwner>
<AlertMessageId>$MPElement[Name="Microsoft.Exchange2007.Cas.MSExchangeOWA.51.AlertMessage"]$</AlertMessageId>
<AlertParameters>
<AlertParameter1>$Data/EventDescription$</AlertParameter1>
</AlertParameters>
<Suppression>
<SuppressionValue/>
</Suppression>
</WriteAction>
</WriteActions>
</Rule>