How to install hotfix in Microsoft Dynamics AX2009

To install the hotfix in live instance, we have followed below mentioned prerequisites:

1. Take an approval for downtime it should include (Start time and End time).

2. Download the required HOT fix (KB XXXXXX) in live server.

3. Extract the KB file and cross check the objects getting modified by hotfix.

4. Get the full access from client to access SQL server DB and Application (For taking Database and Application files)

Installation steps:

Note: As per the Microsoft standard process, before installing hot fix in live instance, it should be installed in test instance and after complete testing and taking an necessary approval from client, this needs to be installed in live instance.

Step1: Send an email to client at the time of starting the installation process.

Step2:  STOP the Dynamics AX AOS Service in Live instance and take the backup of application files and Database backups

Application file path: C:\Program Files\Microsoft Dynamics AX\50\Application\*

Note: This is the default path and it may vary from client to client.

Step3: Start the AOS services and Install the downloaded Hotfix.

Step4: Restart the AOS services once again and start the AX application

Step5: Go to AOT by pressing Ctrl+D, start the Full compilation of AOT.

Step6: If you get any errors while compilation fix the errors and proceed for synchronization of the Data Dictionary from the AOT.

Note: Below mentioned steps to identify the AX application installation folder location.

Go to: Start Menu > Administrative Tools > Microsoft Dynamics AX 2009 Server Configuration

See text in Application-File-Location in Tab: {Application Object Server}

Thanks for visiting my blog

“Yours – Ravi Theja Madisetty”


  1. Can you please tell me approx what time this hotfix could take ?

  2. Hi Somya,
    Hotfix installation won’t take more than one hour, but if you receive any errors (code merging, layer conflicts) in a compilation, that will take more time.
    My suggestion is to restore production application files and database to test/dev instances, install the hotfix, fix any code errors and test the hotfix.
    On successful testing, you can move application files to the production environment (this will reduce more downtime).

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: