I would like to obtain a link to any useful documentation on how to
activate/install sthe windows messenger on the our companyexchange servers
(2000/2003) to enable the internal users to IM other users of the same
company but located in another country.

Additionally I would like to know if it is possible to enable the windows
messenger for the internal users to IM people on the public MSN messenger.
And if this is possible how can I limit the usage of this feature to only one
person, a department?