Conferencing Attendant could not negotiate TLS and failed to establish a SIP connection.
This issue may occur due to TLS certificates on the Skype for Business Server 2015 Front End and the Conferencing Attendant being expired, or not in sync.
Check and resolve certificate issues, mismatches between the Skype for Business Server 2015 Front End and Conferencing Attendant to restore connectivity.
Target | Microsoft.LS.2015.Component.CAA | ||
Parent Monitor | System.Health.AvailabilityState | ||
Category | AvailabilityHealth | ||
Enabled | True | ||
Alert Generate | True | ||
Alert Severity | Error | ||
Alert Priority | Normal | ||
Alert Auto Resolve | True | ||
Monitor Type | Microsoft.LS.2015.MonitorType.PairedEvent.Simple | ||
Remotable | True | ||
Accessibility | Public | ||
Alert Message |
| ||
RunAs | Default |
<UnitMonitor ID="Microsoft.LS.2015.Monitoring.UnitMonitor.PairedEvent.CAA.CAA_E_TLS_FAILURE_ALARM" Accessibility="Public" Enabled="true" Target="Microsoft.LS.2015.Component.CAA" ParentMonitorID="Health!System.Health.AvailabilityState" Remotable="true" Priority="Normal" TypeID="Microsoft.LS.2015.MonitorType.PairedEvent.Simple" ConfirmDelivery="true">
<Category>AvailabilityHealth</Category>
<AlertSettings AlertMessage="Alert_Conferencing_Attendant_could_not_negotiate_TLS_and_failed_to_establish_a_SIP_connection.">
<AlertOnState>Error</AlertOnState>
<AutoResolve>true</AutoResolve>
<AlertPriority>Normal</AlertPriority>
<AlertSeverity>Error</AlertSeverity>
<AlertParameters>
<AlertParameter1>$Data/Context/EventDescription$</AlertParameter1>
</AlertParameters>
</AlertSettings>
<OperationalStates>
<OperationalState ID="Microsoft.LS.2015.Monitoring.UnitMonitor.PairedEvent.CAA.CAA_E_TLS_FAILURE_ALARM.Success" MonitorTypeStateID="SuccessEventRaised" HealthState="Success"/>
<OperationalState ID="Microsoft.LS.2015.Monitoring.UnitMonitor.PairedEvent.CAA.CAA_E_TLS_FAILURE_ALARM.Error" MonitorTypeStateID="ErrorEventRaised" HealthState="Error"/>
</OperationalStates>
<Configuration>
<ComputerName>$Target/Host/Host/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$</ComputerName>
<LogName>Lync Server</LogName>
<SuccessExpression>
<Or>
<Expression>
<And>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="UnsignedInteger">33068</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="String">PublisherName</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="String">LS Conferencing Attendant</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
</And>
</Expression>
<Expression>
<And>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="UnsignedInteger">33002</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="String">PublisherName</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="String">LS Conferencing Attendant</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
</And>
</Expression>
</Or>
</SuccessExpression>
<ErrorExpression>
<And>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="UnsignedInteger">33067</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="String">PublisherName</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="String">LS Conferencing Attendant</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
</And>
</ErrorExpression>
</Configuration>
</UnitMonitor>