The long-awaited Microsoft Azure Stack, which lets enterprises build a private-cloud version of the Azure public cloud in their own data centers, will begin shipping in September.

The tech giant made the announcement today, at its Microsoft Inspire partner event. The company said it delivered Azure Stack software to its hardware partners, which enables it to begin the certification process for their integrated systems.

Customers can now order these systems from Dell EMC, Hewlett Packard Enterprise (HPE), and Lenovo. Azure Stack systems from other hardware partners, including Cisco, will be available in the future.

Dell EMC and Microsoft had previously announced their Azure Stack system. HPE, on the other hand, announced its Azure Stack system today.

In an HPE blog post, Michelle Hannula, product marketing manager at HPE, said enterprise Linux distribution provider SUSE is also collaborating on the HPE ProLiant for Microsoft Azure Stack. The integrated systems will SUSE Linux Enterprise Server and “additional [SUSE] solutions,” the blog said.

In addition to announcing the soon-to-ship Azure Stack systems, Microsoft released pricing for the pay-per-use and capacity-based models, as well as a development kit that aims to help developers build applications for integrated Azure systems deployments. A free single-server deployment option for trial purposes is available for download.

Azure Stack will give enterprises a “truly consistent hybrid cloud platform,” said Mike Neil, corporate VP, Azure infrastructure and management, in a Microsoft Azure blog post. It will allow companies to build and deploy applications using the same APIs, DevOps tools, and portal across their public Azure cloud and on-premises private cloud.

“The ability to run consistent Azure services on-premises gets you full flexibility to decide where applications and workloads should reside,” Neil wrote.

The software comes as a growing number of businesses are looking to optimize placement of their workloads between public and private clouds.

Right Scale’s most recent State of the Cloud survey found hybrid cloud is the preferred enterprise strategy, with 67 percent of businesses adopting both public and private cloud environments in 2017. Additionally, an IDC report published last week found on-premises private clouds will account for 62.2 percent of spending on private cloud IT infrastructure in 2017, and will grow 9.6 percent year over year.

It’s also a strategic move for Microsoft, which wants to end Amazon Web Services’ (AWS) reign as the sector’s top cloud services provider.

Microsoft Azure’s revenue grew 93 percent in the first quarter of 2017, compared to AWS’ 43 percent growth. Azure claims to be the fastest growing cloud provider with over 120,000 new customers every month in the most regions across the globe.

As part of its effort to boost its cloud business, Microsoft last week said it will cut 3,000 sales jobs and shift its focus to Azure products and services.

A day after announcing these layoffs, Microsoft’s CIO Jim DuBois reportedly left the company. DuBois, who was named CIO in 2013, has been with the company since 1993.