Microsoft recommends aligning on-premises UPNs with Microsoft Entra ID, but what happens when they don't match? In this practical session, we'll explore the real-world impact of UPN mismatches on Primary Refresh Tokens (PRT), Hybrid Join, Seamless SSO, and Intune enrollment. Using lessons learned from a real customer project, you'll discover the challenges of routable versus non-routable UPNs, key prerequisites and limitations, and the available remediation options when changing UPNs is not possible. Walk away with a clear understanding of the risks, design considerations, and implementation strategies for hybrid identity environments. Key Takeaways:

• Understand why Microsoft recommends matching on-premises and Entra ID UPNs.
• Learn how UPN mismatches impact authentication, PRT, Hybrid Join, Seamless SSO, and Intune enrollment.
• Identify common issues associated with routable and non-routable UPNs.
• Explore available options when changing user UPNs is not feasible.
• Discover prerequisites, limitations, and planning considerations for a successful implementation.
• Gain practical insights from a real-world customer migration project.