PROBLEMS ARISING WHEN USING THE MICROSOFT OUTLOOK 2010 EMAIL CLIENT WITH MICROSOFT EXCHANGE SERVER 2019 AND THEIR SOLUTIONS

This article analyzes the technical and software problems that arise when the Microsoft Outlook 2010 email client is used together with Microsoft Exchange Server 2019. It examines issues related to software version compatibility, the MAPI over HTTP and Outlook Anywhere protocols, the Autodiscover service, DNS records, TLS certificates, authentication, and network connectivity. Based on Microsoft’s official support documentation, the article explains the protocol-level connectivity options available when Outlook 2010 SP2 and the relevant updates are installed. In addition, it presents a methodology for organizing laboratory testing, a diagnostic algorithm, PowerShell commands, and troubleshooting recommendations. The article also specifically notes that, as of 2026, both Outlook 2010 and Exchange Server 2019 have reached the end of their support lifecycle, which substantiates the need for a secure migration.