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When you deploy Microsoft Skype for Business Server 2019 together with a stand-alone Mediation server pool, the following event ID 25075 is logged on the Mediation server:

Log Name:      Lync Server

Source:        LS Mediation Server

Date:          DateTime

Event ID:      25075

Task Category: (1030)

Level:         Warning

Keywords:      Classic

User:          N/A

Computer:      ComputerName


Mediation Server encountered an invalid setting that has been ignored.

Setting: Mediation Server Front End side SipHealthMonitor port not configured.  Health monitor is disabled.

Reason: N/A

Cause: Settings configured incorrectly.


Reconfigure the specified setting.

Event Xml:

<Event xmlns="">


<Provider Name="LS Mediation Server" />

<EventID Qualifiers="33798">25075</EventID>




<TimeCreated SystemTime="SystemTime" />


<Channel>Lync Server</Channel>


<Security />



<Data>Mediation Server Front End side SipHealthMonitor port not configured.  Health monitor is disabled.</Data>





To fix this issue, install the September 2019 cumulative update 7.0.2046.143 for Skype for Business Server 2019, Mediation Server.

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