AppSource - Code Signing

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Posted on by NI-V3

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Hi,
I'm planning to submit an application to the Microsoft AppSource Marketplace, and so I have contacted a certificate vendor on the same. The Certificate Vendor says .app files cannot be signed and wants us to convert the .app file into .appx file format. I have two queries on this:

How to convert .app file into .appx file?
Do Microsoft accept a signed .appx file as a Business Central app?

Thanks in advance.

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Dynamics 365 Business Central

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Ramesh Kumar 7,547 Super User 2026 Season 1 on at

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Interesting, I’ve always known that when submitting an application for the AppSource marketplace certification, we use the .app file, not the .appx file. I'm not sure how the .appx file will work with Business Central, though.

Please double check.

Thanks

Ramesh

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Jainam M. Kothari 15,803 Super User 2026 Season 1 on at

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Hello,

Microsoft Business Central requires that the app file submitted to AppSource be in the .app format and digitally signed.

Converting your .app file to .appx and signing it will not meet the submission requirements for Business Central.

You should ensure that your .app file is signed directly.

May this can help : https://learn.microsoft.com/en-us/windows/win32/appxpkg/make-appx-package--makeappx-exe-

https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/developer/devenv-checklist-submission

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Ashwin Nimbulkar 166 on at

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You must use .app file to submit a Business Central app to AppSource.

Maybe this can help: https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/developer/devenv-checklist-submission

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Gerardo Rentería Ga... 25,555 Most Valuable Professional on at

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Hi, good day
I hope this can help you, and give you some hints.

Sign an app package file - Business Central | Microsoft Learn

Code Signing in 2024 - Katson.com | MVP

Sign App File - part 2 - theDenSter

Best Regards
Gerardo

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Suresh Kulla 50,269 Super User 2026 Season 1 on at

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You don't need .appx file, try ssl.com they provide esigner which you can use to sign the app.

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Khushbu Rajvi. 22,130 Super User 2026 Season 1 on at

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Hope this helps as well: https://community.dynamics.com/forums/thread/details/?threadid=ffa67628-ca43-4276-a595-00ad35e39e57

https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/developer/devenv-sign-extension

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Vahid Ghafarpour 12,228 Super User 2026 Season 1 on at

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