DOCUMENT:Q173656  19-DEC-1999  [exchange]
TITLE   :XFOR: How to Troubleshoot Authenticated IMS Logons w/ Base64.exe
PRODUCT :Microsoft Exchange
PROD/VER:winnt:5.5
OPER/SYS:
KEYWORDS:

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The information in this article applies to:

 - Microsoft Exchange Server, version 5.5 
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SUMMARY
=======

This article discusses how to use the Base64.exe utility and a Telnet or TCP
session to troubleshoot authenticated logons to the Microsoft Exchange Server
Internet Mail Service (IMS).

MORE INFORMATION
================

Use the following steps to test an authenticated logon to the IMS using the
Base64.exe utility and a Telnet session:

1. Start Base64.exe and type the following command, where USERNAME is the
   Windows NT account used to login to the Windows NT domain:

   " encode USERNAME " (without the quotation marks)

   This returns the user name in Base64 code. For example, the name "jsmith"
   returns "anNtaXRo".

2. Repeat step 1 for your Windows NT account password by typing:

   " encode PASSWORD " (without the quotation marks)

3. Start a Telnet session with the IMS by typing the following command:

   " TELNET servername 25 " (without the quotation marks)

   A response similar to the following should be displayed:

   220 server.domain.com ESMTP Server (Microsoft Exchange Internet Mail Service
   5.5.1664.3) ready

4. Type the following command in the Telnet window:

   " auth login " (without the quotation marks)

   This returns the following response, which represents the word "Username" in
   base64:

   334 VXNlcm5hbWU6

5. Type the Base64-encoded user name from Step 1 into the Telnet session and
   press Enter. The following response will appear, which represents the word
   "Password" in base64:

   " 334 UGFzc3dvcmQ6 " (without the quotation marks)

6. Type the Base64-encoded password from Step 2 into the Telnet session and
   press Enter. The following response will appear, which indicates a successful
   login to the IMS:

   235 LOGIN authentication successful


Additional query words:

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Keywords          :  
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : winnt:5.5
Issue type        : kbhowto

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