SCCM MSIX Conversion Process 13 Steps Guide

SCCM MSIX Conversion Process

SCCM 1810 or later comes with a new feature to convert MSI packages to MSIX. In this post, I will share you my experience of using the SCCM MSIX package conversion feature (SCCM MSIX Conversion Process). I will also share the process which I followed to make this MSIX package work on Windows 1809 device. 

[Related Post SCCM MSIX Application Deployment Guide to Deploy 7Zip.MSIX]

MSIX Packages or Applications

There are several types of application installation, maintenance, and removal technologies. Some of the examples are EXE, MSI, APP-V, etc. The MSIX is the new application installation, maintenance, and removal techniques by Microsoft.

MSIX is the technology Microsoft is pushing for modern Windows 10 devices. They have taken care of old MSI and App-V packaging issues with MSIX. Windows store application will also be in MSIX format. I would recommend reading the following post on MSIX.

MSIX Package Creation Video

SCCM MSIX Conversion Process

I will share the end to end MSI to MSIX conversion process in this blog post. Let’s discuss the prerequisites first. You will see more detailed process explained in the below diagram (SCCM .MSIX Conversion Process).

  • Signing Certificate (Public or Internal PKI)
  • Windows 10 1809 Device
  • MSIX Package Conversion Tool
  • Remote SCCM 1810 Console on Windows 10 1809 device
  • Windows 10 SDK tool SignTool.exe
SCCM MSIX Conversion Process
SCCM MSIX Conversion Process

Internal PKI, Public Cert – MSIX Code Signing Certificate?

In this post, I will be using internal PKI cert to create MSIX signing certificate. However, you can use public PKI certs (DigiCert & Verisign) also to sign MSIX packages. Also, you can use self signed certificate to test MSIX application. This is the first step towards SCCM MSIX Conversion Process.

  • Internal PKI Certificate (More secured to sign internal LOB apps which should be deployed to corporate environment?)
  • Public Certificate (More useful when you will have an app which  needs to be deployed to more than one business or corporate environment)
  • Self Signed Certificate (Testing of MSIX package)

How to Create Internal PKI Signing Certificate Template for MSIX Application

As I mentioned above, I will be using an internal PKI certificate to sign MSIX packages. You should install this signing certificate on Windows 10 1809 or later device before installing the MSIX application. This step is the second step towards SCCM MSIX Conversion Process.

  • Login to Microsoft Certificate Authority server (Of course with proper access)
  • Launch MMC and Certificate Templates
  • Select Certificate Templates  -> Right Click on Code Signing  -> Duplicate Template. This action will launch the new Certificate template properties windows.
  • (1) Select the Compatibility tab – 1. Change Certificate Authority to Windows Server 2008 R2 or Higher and 2. Change the Certificate Recipient to Windows 7/Server 2008 R2 or Higher.
  • (2) Click on the Security tab and add an AD user or AD group to Allow them to Enroll the certificate. You might need to consider adding computer when you use a computer to request certs from CA
  • (3) Click on the General tab and provide a useful name for this new MSIX signing template.
  • (4) Select the Request Handling tab and Check the box to allow private key to be exported.
  • (5) Click on the Extensions tab and 1. select on the Application Policies Extension and verify Code Signing is there or not 2. Click on Basic Constraints & click Edit and check the box to Enable this extension.
  • (6) Click on the Subject Name tab and select the Supply in the request radio button and Click OK on the warning.
  • Click OK to finish the new template creation for MSIX signing.
SCCM .MSIX Conversion Process
Create Signing Certificate Template

How to Issue Internal PKI Signing Certificate Template for MSIX Application

In this section, you will how to issue the MSIX application signing certificate template to the Windows devices or users. I’ve already created a signing certificate template in the above section. Third step – SCCM MSIX Conversion Process.

The following steps will ensure that your Windows devices or users can request new MSIX signing the certificate for MSIX package creation and installation. The requesting of the certificate should be done from the Windows 10 device, and that is explained in the following sections of this post.

  • Login to CA server with proper access.
  • Launch MMC and add Certificate Authority.
  • Click expand Certificate Authority and navigate to {CA Name}, Right Click Certificate Templates,  select New and click on Certificate Template to Issue.
  • Select the Template Name (_MSIX Template) just created and Click OK.
  • Now MSIX application signing certificate is available for request.
SCCM MSIX Conversion Process 13 Steps Guide 1
MSIX Application Signing Certificate Template is Ready to Issue

Request MSIX Application Code Signing Certificate – Windows 10

Now, I have shown you how to create a new signing certificate template for MSIX application and How to make the signing certificate ready for issuing. The following steps should be completed from Windows 10 1809 or later devices. Fourth step – SCCM MSIX Conversion Process.

NOTE – The following steps are a manual way to request for MSIX application signing certificate. This process is used only at the time of the MSI to MSIX conversion process. I would recommend using group policy to deploy these certs to Windows 10 machine in a production scenario.

  • Login Windows 10 1809 or later devices (Admin rights)
  • Launch CertMgr.msc
  • (1) Navigate through Current user -> Personal -> Right Click on Certificates -> All Tasks -> Request New Certificate.
  • (2) Click Next on the Before You Begin screen and click on ensure Active Directory Enrollment Policy is selected and Click Next.
  • (3) Click on the link below the _MSIX Code Signing template to configure additional settings.
  • (4) Under Subject Name the type should be Common Name (i.e.  Anoop). The Value must be the same as the Publisher value in the SCCM MSIX package conversion Wizard and click on Add button.
  • (4.1) Select _MSIX Signing is selected and click Enroll
  • (5) Enrollment of the MSIX code signing certificate will take some time
  • (6) Successfully completed the MSIX code signing Certificate
SCCM MSIX Conversion Process 13 Steps Guide 2
Six (6) steps to complete MSIX Code Signing Cert Enrollment

Export MSIX Code Signing Certificate to PFX file

Now you know how to request an MSIX code signing certificate. In this section, you will learn how to export MSIX code signing certificate to PFX file. The PFX file will be used to sign the MSIX application.

Once the MSIX application is signed with a certificate then, it’s almost ready to deploy MSIX application via SCCM or from Windows store. The following steps will help you to export the PFX file.

  • Login Windows 10 1809 or later devices (Admin rights)
  • Launch CertMgr.msc
  • Navigate through Current user -> Personal -> Certificate 
  • (1) Right Click the_MSIX -> Click All Tasks -> Click Export
  • (2) Click the Next button from the welcome screen. Select ‘Yes, export the private key’ and Click Next.
  • (3) On the next windows, I selected all the default configuration. Click “Personal Information Exchange” – select “All certificates in the certification path if possible” and “Enable Certificate Privacy” options are selected. Click on Next button.
  • (4) Select the Password checkbox, Enter a password and click on Next.
  • (5) Provide a path and filename for the PFX file, click on Next button twice and click OK
  • The PFX certificate file is ready to sign MSIX application.
SCCM MSIX Conversion Process 13 Steps Guide 3
Five (5) steps to Export PFX file for MSIX Application Signing

SCCM Console, MSIX Package Conversion Tool, Local Admin, SignTool.exe

Make sure you have all the prerequisite to run the MSIX conversion wizard from SCCM console. You need to ensure all these before proceeding to next stage of SCCM MSI to MSIX conversion process. Fifth step – SCCM MSIX Conversion Process.

The following are the prerequisite to run the MSIX conversion wizard. While running the conversion wizard, SCCM will install the MSI package on the Windows 10 machine and capture it to convert to MSIX package. This activity is done using the MSIX packaging tool in the background.

  • Windows 10 1809 or later
  • Local Admin access on Windows 10 device
  • SCCM 1810 or later console
  •  MSIX Packaging Tool from the Windows store
  • Package Source and Package destination access
  • Clean Windows 10 machine without any other app installed
  • Install Windows 10 1809 or later SDK or copy SignTool.exe from Windows 10 SDK installed the machine
  • Make sure you have a copy of the PFX file with the password (as explained in the above step)
SCCM MSIX Conversion Process 13 Steps Guide 4
Get Set Ready – Prerequisites for MSIX Conversion

SCCM MSIX Conversion Wizard

Make sure you have all the prerequisites mentioned in the above section before you proceed further. As I mentioned about this wizard will use MSIX packaging tool in the background to convert MSI packages to MSIX. Sixth step – SCCM MSIX Conversion Process.

SCCM MSIX conversion wizard (1810) is not capable of handling certificate signing of MSIX applications. So, MSIX code signing should be done as a separate process as a process as I mentioned in the below section.

  • Login to Windows 10 1809 or later device with local admin access.
  • Launch SCCM 1810 or later console. Launch SCCM console with Administrator privileges.
  • Navigate to Software Library -> Applications -> Select the MSI application that you want to convert to MSIX.
  • Click on .MSIX Conversion wizard from ribbon menu of the SCCM console.
  • Click next on the welcome page of .MSIX conversion wizard.
  •  (1) Enter the “Subject Name of the Signing Certificate”. Ensure that you use the same name which you used in the above section “Request MSIX Application Code Signing Certificate”. In this example I used Anoop as subject name.
  • (1.1) Use the package Save location to store the .MSIX package after the conversion and click on Next button to start the conversion process.
  • (2) The .MSIX package conversion process may take longer time depending on the complexity of the .MSI package and the performance of your infra.
  • (3) Finish the .MSIX conversion wizard. Your MSI package got converted to .MSIX package and  ready for code signing. 
SCCM MSIX Conversion Process 13 Steps Guide 5
SCCM .MSIX Conversion Wizard

Sign MSIX Application with Code Signing Certificate – SignTool.EXE

I have installed Windows 10 SDK on Windows 10 1809 device, and that is the device, which I’m going to use for sign MSIX application with code signing certificate.

I will be using SignTool.EXE to sign the MSIX package which I created in the above section. The following are the parameters for SignTool.exe. Seventh step – SCCM MSIX Conversion Process.

C:\Program Files (x86)\>signtool.exe /?
sign — Sign files using an embedded signature.
timestamp — Timestamp previously-signed files.
verify — Verify embedded or catalog signatures.
catdb — Modify a catalog database.
remove — Remove embedded signature(s) or reduce the size of an
embedded signed file

The following is the command I used for signing MSIX application. 
SignTool sign /fd <Hash Algorithm> /a /f <Path to Certificate>.pfx /p <Your Password> <File path>.MSIX

C:\Program Files (x86)\Windows Kits\10\bin\10.0.17763.0\x64>”signtool.exe sign /fd SHA256 /a /f C:\Users\anoop.INTUNE\Desktop\MSIXSelfSignedCert.pfx /p <Password> <MSIX File Path> \7-Zip18__dqdffe9d0d2vy1.msix”
Done Adding Additional Store
Successfully signed: 

SCCM MSIX Conversion Process 13 Steps Guide 6
Code Signing 7Zip18.MSIX Application with SignTool.exe

 Enable SideLoading on Windows 10 Device

You won’t be able to install MSIX app, unless and until you enable the sideloading options in Windows 10. There are many ways to sideload apps within Windows. You can use 1. manual method, 2. Powershell method or 3. Group Policy method to enable sideloading.

 The following steps will enable the sideloading on Windows 10 machine with Group Policy. Eighth step – SCCM MSIX Conversion Process.

  • Open the Group Policy Management Editor for a domain-based Group Policy Object (GPO) to which you will be applying the group policy setting, as specified below, to your selected PCs.
  • Click to expand Computer Configuration, Administrative Templates, Windows Components, and then App Package Deployment.
  • Double-click the Allow all trusted apps to install setting.
  • In the Allow all trusted apps to install window, click Enabled and then click OK.

I used the manual method to sideload the app in the scenario. You can go to Settings option and enable sideloading from Updates & Security -> for Developers -> Click on Sideload app option and Click YES on the warning screen.

SCCM MSIX Conversion Process 13 Steps Guide 7
Enable MSIX Sideload App from Settings

Install MSIX Application

Now you are ready to install MSIX application on Windows 10 devices. Double click and install it manually on any Windows 10 device. I will cover how to deploy MSIX application with SCCM in the future blog post. Last step – SCCM MSIX Conversion Process.

SCCM MSIX Conversion Process 13 Steps Guide 8
MSIX App Installation Process



  1. Hi – You got me worked out on this new tool. Will be spending this weekend experimenting MSIX conversion and LAPS within the lab.

    Thanks – Good write up…


  2. Hi
    I tried creating msix package , but I am facing issue with signing the msix package.
    Error :
    SignTool Error: This file format cannot be signed because it is not recognized.
    Can u help me out in this issue?
    Thanks in advance

  3. I guess there is no error with the certificate because when I tried to create msix package from MSIX Packaging tool I used the same certificate and it worked fine
    But when I am using sign tool to sign it I am getting the following error irrespective of the application:

    Done Adding Additional Store
    SignTool Error: This file format cannot be signed because it is not recognized.
    SignTool Error: An error occurred while attempting to sign: \7-Zip18.03x64edition_1.0.0.0_x64__v4teb3zypt9er.msix

    Number of errors: 1


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