Help! We have several hundred Macs(ver 9.04) pointing to our ISA Server. Since the implementation of ISA several of these Macs will get the following 'Page cannot be displayed' message while trying to access different websites: HTTP 407 Proxy Authentication Required. Access to the Web Proxy service denied (12209). -or- 10060-Connection timeout These Macs share the same ISA server with hundreds of PCs and we have encountered NO connection/authentication probs with the PCs. Any suggestions/ideas much appreciated. Thanks