---
title: Microsoft 365 E3 to E5 Upgrade Case Study | ProArch
description: See how ProArch helped a software company upgrade 1,000 seats from Microsoft 365 E3 to E5, strengthening security across identity, data, and devices.
---

[ProArch Case Studies | Real Client Success Stories ](https://www.proarch.com/case-studies)

# [Microsoft 365 E3 to E5 Upgrade Case Study | ProArch](https://www.proarch.com/case-studies/microsoft-365-e3-to-e5-upgrade-software-company)

 Written by [ProArch](https://www.proarch.com/case-studies/author/proarch) | Jun 5, 2026 11:40:35 AM

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[View full post](https://www.proarch.com/case-studies/microsoft-365-e3-to-e5-upgrade-software-company)

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