Thursday, 3 September 2026

Public Preview for Business Central 29.0 (2026 Release Wave 2) Is Here

 The preview environments for Business Central 2026 release wave 2 are now rolling out globally. If you have access to the Business Central admin center, you can spin up a sandbox on version 29.0 today and start looking at what is coming.

Microsoft's announcement and the full details are here: aka.ms/BCMajorUpdates

What this actually is

Twice a year, Business Central gets a major update. Wave 1 lands in April, wave 2 in October. Ahead of each one, Microsoft opens up preview environments so partners and customers can test their own apps, extensions, and integrations against the new version before it becomes the version everyone is running.

That is what just happened. Version 29.0 is the wave 2 release, and the preview build is available now.

This is not a "read the release notes and nod" moment. It is the window where you can find the thing that breaks your customer's environment and get it fixed before it becomes a production incident.

How to get a preview environment

From the Business Central admin center, go to Environments, choose New, and create a Sandbox. In the Version dropdown, pick the 29.0 preview build.





A few things worth knowing before you do:

  • Create it as a Sandbox, not Production. Preview builds are for testing and nothing else.
  • Preview environments are temporary. Do not build anything on one that you expect to keep.
  • Localization matters. If you support multiple countries, test the ones you actually deploy to.

What to test

If you are a partner or an ISV, the list is fairly short and fairly obvious:

Your AL extensions. Recompile against the 29.0 symbols. Deprecations and breaking changes in the base application show up here first, and they show up as compile errors, which is the cheapest possible place to find them.

Your integrations. API pages, OData endpoints, web services, anything talking to Business Central from the outside. These break quietly, which makes them worse than the things that break loudly.

Your customer-specific customizations. The ones nobody has looked at in two years are the ones that will surprise you.

The new features you care about. Check the release plan on Microsoft Learn for what is in wave 2, then go poke at the features that touch your customers' processes. Reading about a feature and using it produce different opinions.

Reporting what you find

If something is broken, report it. This is the part that matters most and gets skipped most.

Bugs and feedback go here: aka.ms/BCPreviewBugs

A good report saves everyone time. Include the version number, the localization, whether it reproduces on a clean environment, and the steps to get there. If you can reproduce it without your own extensions installed, say so, because that immediately tells the engineering team it is theirs and not yours.

Why this is worth your time

The preview window is short. Once the release goes GA and your environments start updating, a problem you could have raised as a preview bug becomes a support ticket with a customer waiting on the other end of it.

The people who find the interesting problems during preview are the ones running real extensions against real data. That is you. Microsoft cannot test every combination of ISV app, custom code, and integration that exists in the field, and it does not pretend to. That is exactly why the preview exists and why the feedback loop is open.

So create a sandbox, recompile your code, and go looking for trouble. Better to find it now.

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