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title: Business Central 2019 release wave 2
summary: Upgrading on-premises Business Central from version 14 (Spring 2019) to version 15 (2019 release wave 2), plus installing version 15 updates and a compatibility matrix for upgrade paths. It answers questions about upgrade strategies, technical upgrade tasks, unmodified application upgrades, and minimum versions for upgrades.
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---

# Business Central 2019 release wave 2

> Upgrading on-premises Business Central from version 14 (Spring 2019) to version 15 (2019 release wave 2), plus installing version 15 updates and a compatibility matrix for upgrade paths. It answers questions about upgrade strategies, technical upgrade tasks, unmodified application upgrades, and minimum versions for upgrades.

Path: [Business Central on-premises](../../../business-central-on-premises.md) > [Upgrade](../../upgrade.md) > [Earlier versions](../earlier-versions.md) > Business Central 2019 release wave 2 · tier official · system platform · narrative reviewed (checked by Opus)

## Overview

This section covers the 2019 release wave 2 (version 15) upgrade for on-premises Business Central. It describes how to move from version 14 and how to apply later cumulative updates to version 15.

## Key points

- Start with 'Upgrade to Business Central 2019 Wave 2'. It describes the upgrade paths from version 14: full uptake of the base and system applications, or a minimal upgrade of a customized application.
- 'Upgrade an unmodified application' covers version 14 to 15 for single-tenant and multitenant deployments. Tasks include converting databases to the new platform, publishing and synchronizing extensions, installing the system and base applications, and running the data upgrade.
- 'Technical Upgrade' covers moving from version 14 to 15 with C/AL to AL code conversion. Its tasks include database preparation, platform conversion, extension migration, the task scheduler, encryption management and control add-ins.
- 'Install a version 15 update' covers cumulative updates for 2019 release wave 2. Steps include platform upgrade, application update, extension uninstallation, database conversion, server instance configuration and license import.
- The compatibility matrix lists minimum update versions for upgrades between major versions (15 to 28), on-premises and online.
- Per the matrix, upgrades from version 24 or earlier must target version 25 first.
- The matrix also shows minimum target versions for upgrading from each cumulative update level of version 14 to versions 15 through 25.

## Learn pages

- [Business Central Upgrade Compatibility Matrix](https://learn.microsoft.com/dynamics365/business-central/dev-itpro/upgrade/upgrade-v14-v15-compatibility): Provides an overview of the Business Central versions and their compatibility
- [Install a version 15 update](https://learn.microsoft.com/dynamics365/business-central/dev-itpro/upgrade/upgrading-cumulative-update-v15): This article describes the tasks required for getting the monthly version 15 update applied to your Dynamics 365 Business Central on-premises.
- [Technical Upgrade](https://learn.microsoft.com/dynamics365/business-central/dev-itpro/upgrade/upgrade-technical-upgrade-v14-v15): The article explains how to upgrade the application code and how to merge code from different versions of the application.
- [Upgrade an unmodified application](https://learn.microsoft.com/dynamics365/business-central/dev-itpro/upgrade/upgrade-unmodified-application): The article explains how to upgrade an application that has no custom code to Business Central 2019 release wave 2.
- [Upgrade to Business Central 2019 Wave 2](https://learn.microsoft.com/dynamics365/business-central/dev-itpro/upgrade/upgrade-overview-v15): The article explains how to upgrade the application code and how to merge code from different versions of the application.

Source: Microsoft Learn (CC BY 4.0). Descriptions are Learn's own.