I'm just asking you about any issues installing the folllowing patches on a Exch 5.5 :
MS01-057 : Specially Formed Script in HTML Mail can Execute in Exchange 5.5 OWA MS01-047 : OWA Function Allows Unauthenticated User to Enumerate Global Address List MS01-041 : Malformed RPC Request Can Cause Service Failure MS01-030 : Incorrect Attachment Handling in Exchange OWA Can Execute Script I mean, problems or malfunctioning or loss functionality, etc Thanks List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm