Appendix A: ISA Server Caching Criteria
HTTP Caching
ISA Server uses the following criteria when caching HTTP objects:
HTTP Methods. The Request Method must be an HTTP GET. Otherwise,
ISA Server bypasses the cache mechanism. An exception is the case of
negative caching. If the request is an HTTP PUT or an HTTP DELETE, ISA
Server purges obsolete data from the cache.
Dynamic Content. By default, ISA Server does not cache dynamic content,
which is defined as URLs that contain a “?.” If you enable caching of
dynamic content, ISA Server caches the object only if the response header
contains an Always Cache meta-tag. This scenario hardly occurs, and for
performance reasons, you should...
