On 2000/03/03 Microsoft released a 19.7MB installation guide for Exchange 2000. Incredibly the package was made up of 1.7 megs of documents - and 18 megs of Netscape 4.7.
To make matters more embarrassing for Microsoft, it was discovered that the 18 megs was in fact a 128-bit secure version of NS, which is bound by tight US government export restrictions. Still it's nice to know what software Microsoft uses in house.
The package was released at:http://www.microsoft.com/exchange/prodinfo/2000/PlanInstall.htm
since deleted by MS
(this news first broke in NTK (www.ntk.net)