An Address List has an invalid Filter Rule (purportedSearch). No directory entries will belong to this Address List until you correct this problem.

Microsoft.Exchange2007.Mailbox.MSExchangeAL.8326 (Rule)

Knowledge Base article:

External

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

Element properties:

TargetMicrosoft.Exchange2007.ServerRole.Mailbox
CategoryEventCollection
EnabledTrue
Alert GenerateTrue
Alert SeverityWarning
Alert PriorityNormal
RemotableTrue
Alert Message
An Address List has an invalid Filter Rule (purportedSearch). No directory entries will belong to this Address List until you correct this problem.
{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.Mailbox.MSExchangeAL.8326" Enabled="onEssentialMonitoring" Target="ExLibrary!Microsoft.Exchange2007.ServerRole.Mailbox" ConfirmDelivery="true" Remotable="true" Priority="Normal" DiscardLevel="100">
<Category>EventCollection</Category>
<DataSources>
<DataSource ID="DS" TypeID="ExDiscovery!Microsoft.Exchange2007.Application.FilteredEventProvider.DS">
<EventSourceName>MSExchangeAL</EventSourceName>
<EventDisplayNumber>8326</EventDisplayNumber>
</DataSource>
</DataSources>
<WriteActions>
<WriteAction ID="GenerateAlert" TypeID="Health!System.Health.GenerateAlert">
<Priority>1</Priority>
<Severity>1</Severity>
<AlertOwner>$Data/PublisherName$</AlertOwner>
<AlertMessageId>$MPElement[Name="Microsoft.Exchange2007.Mailbox.MSExchangeAL.8326.AlertMessage"]$</AlertMessageId>
<AlertParameters>
<AlertParameter1>$Data/EventDescription$</AlertParameter1>
</AlertParameters>
<Suppression>
<SuppressionValue/>
</Suppression>
</WriteAction>
</WriteActions>
</Rule>