Hi! I have front-end and back-end Exchange 2003 server. If I open IIS 6.0 managemnet > Default Web Site, there are following application pools: - DefaultAppPool - ExchangeApplicationPool - ExchangeApplicationMobileBrowserPool If I want to use OWA oder RPC over HTTP and other services on Exchange FE/BE, which pool must I chosse? Which function has the both pools "ExchangeApplicationPool" and " ExchangeApplicationMobileBrowserPool"? Best Regrads Mustafa