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: ====================================================================== ------------------------------------------------------------------------------- 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 " (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: ====================================================================== Keywords : Technology : kbExchangeSearch kbExchange550 kbZNotKeyword2 Version : winnt:5.5 Issue type : kbhowto ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1999.