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Migrating from Microsoft Proxy Server 2.0

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Microsoft Internet Security and Acceleration (ISA) Server supports a full migration path for Microsoft Proxy Server 2.0 users. Most Proxy Server rules, network settings, monitoring configuration, and cache configuration will be migrated to ISA Server. Furthermore, ISA Server will continue to support Winsock Proxy client software, together with its own Firewall client software, in a heterogeneous client base.

ISA Server introduces many new features and changes over Proxy Server 2.0. These changes affect the server configuration and upgrade scenarios. This document outlines the key items that an administrator should consider as part of the upgrade process to ISA Server.


  • Perform a full backup of the current Proxy Server 2.0 settings before you upgrade your system.

For information about specific topics, see:

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