Include ISA maintenance procedures into a broader organization-wide plan that includes checklists and step-by-step procedures.
Sign up for automatic notification of new security patches and updates with a service such as the Microsoft Security Notification Service.
Test all patches and updates in an isolated prototype lab environment before deploying them on production ISA servers.
Use third-party hacking tools to audit the security of an ISA environment on a quarterly basis.
Keep free disk space on server volumes above 25%.
Use manual or Windows Update methods to update the Windows operating system on an ISA Server.
Consider the use of a tool such as Microsoft Operations Manager (MOM) 2005 to archive and report on ISA event logs.