DOCUMENT:Q288775 12-NOV-2001 [exchange] TITLE :PRB: Authentication Dialog Box When Exchange Accessed with MAPI PRODUCT :Microsoft Exchange PROD/VER::1.0,1.21,4.0,5.0,5.5 OPER/SYS: KEYWORDS:kbCDO kbMAPI kbMsg kbGrpDSMsg kbDSupport kbExchange2000SP1Fix ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, versions 4.0, 5.0, 5.5 - Extended Messaging Application Programming Interface (MAPI), version 1.0 - Microsoft Exchange 2000 Server - Collaboration Data Objects (CDO), version 1.21 ------------------------------------------------------------------------------- SYMPTOMS ======== When you use MAPI or CDO to log on to an Exchange server, a dialog box prompts you for credentials. This dialog box has the caption "Enter Password" and fields for "User Name", "Domain Name", and "Password". CAUSE ===== The account that the code is running under is in a domain that is not trusted by the Exchange Server's domain, or is not logged on to a domain at all. RESOLUTION ========== MAPI and CDO rely on the Exchange Message Store (EMS) provider to communicate with Exchange. The EMS provider uses the credentials of the user that is currently logged on to establish a remote procedure call (RPC) connection with the Exchange server. If these credentials are insufficient to establish the RPC connection, the provider prompts the user for additional credentials. There is no way to pass credentials to the provider programmatically. There are three ways to avoid this dialog box: - Join the domain in which the Exchange server is operating. In other words, run the code under an account that is in the Exchange server's domain. - Establish a trust relationship between the domain that your computer is running in and the domain of the other computer. If the two domains trust each other, they can exchange authentication information. - Use the SendKeys method or a similar method to fill in the blanks on the credentials dialog box. Note that this method is not recommended, because a subtle change in the layout of the dialog box may break it. The last option is the equivalent of manually filling out the credentials dialog box. Note that because no authentication has yet taken place, there is no way to encrypt this information; therefore, it is transmitted as plain text to the Exchange Server. Additional query words: MAPILogon MAPILogonEx Session logon box authentication ====================================================================== Keywords : kbCDO kbMAPI kbMsg kbGrpDSMsg kbDSupport kbExchange2000SP1Fix Technology : kbAudDeveloper kbCDOsearch kbMAPISearch kbExchangeSearch kbExchange500 kbExchange550 kbExchange400 kbZNotKeyword kbZNotKeyword2 kbExchange2000Search kbCDO121 kbExchange2000Serv kbMAPIExt Version : :1.0,1.21,4.0,5.0,5.5 Issue type : kbbug Solution Type : kbfix ============================================================================= 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 2001.