Rob Horwitz

Rob Horwitz

Analyst

Rob Horwitz analyzes and writes about Microsoft licensing programs and product licensing rules. He also trains organizations on best Microsoft licensing practices.

Before co-founding Directions on Microsoft in 1992, Rob spent eight years at Microsoft in a variety of software development and technical marketing roles. He was a software developer on the first version of Macintosh Word and marketed Microsoft operating system- and server-based products while in the developer relations, networking product marketing, international, and OEM marketing groups.

Rob holds a B.S. in computer science from the Massachusetts Institute of Technology and an M.B.A. from Wharton.

Latest Content by Rob Horwitz

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Updated: April 16, 2025 · by Rob Horwitz
Office 365 and Microsoft 365 Comparison Compares the set of online services included with Office 365 E1/E3/E5 suites to those included with Microsoft 365 F3/E3/E5 suites
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Updated: April 8, 2025 · by Rob Horwitz
Windows Enterprise Rights Flowchart
Windows Enterprise Rights Flowchart Illustrates the ways an organization can acquire the right to install and run Windows Enterprise edition locally on an end-user’s...
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Updated: April 8, 2025 · by Rob Horwitz
Per Core License Model Flowchart Explains how to calculate the number of core licenses required for SQL Server 2016/2017/2019/2022 Enterprise and Standard editions under the...
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Updated: April 8, 2025 · by Rob Horwitz
Table explains licensing rules for Microsoft 365 Apps for enterprise and Office Professional Plus when running within server-based desktop deployments hosted at service providers.
Office Suite Hosting Scenarios Explains licensing rules for Microsoft 365 Apps for enterprise and Office Professional Plus when running within server-based desktop deployments hosted...
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Updated: April 8, 2025 · by Rob Horwitz
Visual Studio with MSDN Edition Packaging
Visual Studio with MSDN Edition Packaging Compares development and test tools, OSs, application software, online services, and other benefits included with editions of Visual Studio with...
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Updated: April 8, 2025 · by Rob Horwitz
Windows VDI Hosting Scenarios Lists client-side licenses that provide rights to run and access Windows client OS-based virtual desktops (sometimes called a VDI) hosted...
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Updated: April 8, 2025 · by Rob Horwitz
SQL Server Hosting Scenarios Explains the rules for applying SQL Server Standard and Enterprise edition core licenses purchased through volume licensing programs toward workloads...
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Updated: April 8, 2025 · by Rob Horwitz
Windows Server Hosting Scenarios Explains the rules for applying Windows Server Standard and Datacenter edition core licenses purchased through volume licensing programs toward workloads...
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Updated: April 8, 2025 · by Rob Horwitz
Windows client OS edition packaging Compares technical feature and use right differences across Windows 10 /11 Pro, Windows 10 / 11 Enterprise Per Device, and...
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Updated: April 8, 2025 · by Rob Horwitz
SQL Server Edition Packaging
SQL Server Edition Packaging Compares SQL Server edition features across versions 2022, 2019, 2017, 2016, 2014, and 2012.