Microsoft Exchange Compliance Audit Service is not starting up

Hi Madhu Perera,

I can see that you're encountering difficulties with the Microsoft Exchange Compliance Audit Service failing to start on your Exchange Server 2019, leading to issues with installing update KB5030877. The error message points to a failure in loading the 'Microsoft.Office.Audit, Version=15.0.0.0' assembly.

Here are some suggestions to address the problem:

1. Reset Service State and Rerun Setup: Run a PowerShell script from an elevated PowerShell window located in the Exchange Server\V15\Bin directory. Execute ServiceControl.ps1 AfterPatch and then restart your server.

2. Uninstall and Reinstall the .msp File: Launch the update from an administrative command prompt, complete the installation, and reboot the server.

3. Adjust Service Startup Type: Set the startup type of the Compliance Audit Service to "Delayed Start" to allow dependencies to initialize properly.

4. Extend Registry Key "ServicesPipeTimeout": Increase the value of the "ServicesPipeTimeout" registry key, especially if the service startup is slow.
   
   
   

Here are some useful links:

CU13 Installation – KB5030877 – Exchange Server 2019 – Frankys Web Forum
Exchange Server 2019 and 2016 August 2023 security update installation fails on non-English operating systems - Microsoft Support
Repair failed installations of Exchange Cumulative and Security updates - Exchange | Microsoft Learn