SIP Proxy: Critical certificate configuration problem

Microsoft.LS.2015.Monitoring.UnitMonitor.PairedEvent.Registrar.SIPPROXY_E_CRITICAL_CERTIFICATE_ERROR (UnitMonitor)

Knowledge Base article:

Summary

A serious problem related to certificates is preventing Skype for Business Server from functioning.

Causes

The Skype for Business Server failed to initialize with the configured certificate.

Resolutions

Review and correct the certificate configuration, then start the service again.

Element properties:

TargetMicrosoft.LS.2015.Component.Registrar
Parent MonitorSystem.Health.ConfigurationState
CategoryConfigurationHealth
EnabledTrue
Alert GenerateTrue
Alert SeverityError
Alert PriorityHigh
Alert Auto ResolveTrue
Monitor TypeMicrosoft.LS.2015.MonitorType.PairedEvent.Simple
RemotableTrue
AccessibilityPublic
Alert Message
[Skype] A serious problem related to certificates is preventing Skype for Business Server from functioning.
{0}

Please see the 'Product Knowledge' and the 'Alert Context' tab on Alert Properties view for more information.
RunAsDefault

Source Code:

<UnitMonitor ID="Microsoft.LS.2015.Monitoring.UnitMonitor.PairedEvent.Registrar.SIPPROXY_E_CRITICAL_CERTIFICATE_ERROR" Accessibility="Public" Enabled="true" Target="Microsoft.LS.2015.Component.Registrar" ParentMonitorID="Health!System.Health.ConfigurationState" Remotable="true" Priority="Normal" TypeID="Microsoft.LS.2015.MonitorType.PairedEvent.Simple" ConfirmDelivery="true">
<Category>ConfigurationHealth</Category>
<AlertSettings AlertMessage="Alert_A_serious_problem_related_to_certificates_is_preventing_Skype_for_Business_Server_from_functioning.">
<AlertOnState>Error</AlertOnState>
<AutoResolve>true</AutoResolve>
<AlertPriority>High</AlertPriority>
<AlertSeverity>Error</AlertSeverity>
<AlertParameters>
<AlertParameter1>$Data/Context/EventDescription$</AlertParameter1>
</AlertParameters>
</AlertSettings>
<OperationalStates>
<OperationalState ID="Microsoft.LS.2015.Monitoring.UnitMonitor.PairedEvent.Registrar.SIPPROXY_E_CRITICAL_CERTIFICATE_ERROR.Success" MonitorTypeStateID="SuccessEventRaised" HealthState="Success"/>
<OperationalState ID="Microsoft.LS.2015.Monitoring.UnitMonitor.PairedEvent.Registrar.SIPPROXY_E_CRITICAL_CERTIFICATE_ERROR.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">14353</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="String">PublisherName</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="String">LS Protocol Stack</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
</And>
</Expression>
<Expression>
<And>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="UnsignedInteger">12288</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="String">PublisherName</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="String">LS Server</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">14623</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="String">PublisherName</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="String">LS Protocol Stack</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
</And>
</ErrorExpression>
</Configuration>
</UnitMonitor>