XFOR: How to Troubleshoot Authenticated IMS Logons with Base64.exe

ID: Q173656

-------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, version 5.5 -------------------------------------------------------------------------- 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 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 3. Start a Telnet session with the IMS by typing the following command: TELNET servername 25 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 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 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


Keywords          : XFOR 
Version           : winnt:5.5
Platform          : winnt 
Issue type        : kbhowto

Last Reviewed: April 28, 1998