setting proxy authentication information in microsoft outllook

From: CARETTA (mail_at_mail.com)
Date: 03/18/04 

Date: Thu, 18 Mar 2004 10:29:03 +0200

I need to have select my proxy from
internet options / connections / LAN Settings to access web sites as a
result of using an ISA Server in my company and it requires authentication

ERROR MESSAGE:
Task 'Hotmail: Downloading folder list. ' reported error (0x800CCC37) :
'Your proxy requires you to authenticate. Contact your network administrator
for assistance.The server responded 'Proxy Authentication Required ( The ISA
Server requires authorization to fulfill the request. Access to the Web
Proxy service is denied. )'. '

If i disconfigure this settings from internet options.

ERROR MESSAGE:
Task 'Hotmail: Downloading folder list. ' reported error (0x800CCC33) :
'Access to the account was denied. Verify that your username and password
are correct.The server responded 'Forbidden ( The ISA Server denies the
specified Uniform Resource Locator (URL). )'. '

Is there any way to set a proxy server for http mail servers in microsoft
outlook ????? (using registry etc.)

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