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Q293218: XWEB: "Failed to Create MAPI.Session" Error Message in OWA

Article: Q293218
Product(s): Microsoft Exchange
Version(s): 5.5
Operating System(s): 
Keyword(s): 
Last Modified: 23-OCT-2001

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The information in this article applies to:

- Microsoft Outlook Web Access, version 5.5 
- Microsoft Exchange Server, version 5.5 
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SYMPTOMS
========

When you try to log on to Outlook Web Access (OWA), you may receive the
following error message in you browser:

  Internal error: failed to create MAPI.Session.

When you click OK, you return to the OWA logon page.

CAUSE
=====

This issue can occur if the Cdo.dll Collaboration Data Objects library is not
properly registered.

RESOLUTION
==========

To resolve this issue, reregister the Cdo.dll library by typing the following
syntax at a command prompt:

  "regsvr32 c:\winnt\system32\cdo.dll" (without the quotation marks)

After you run this command, you receive the following confirmation message from
RegSvr32:

  DllRegisterServer in Cdo.dll succeeded



Additional query words: logon.asp Active Server Pages internal error mapi.session

======================================================================
Keywords          :  
Technology        : kbOutlookSearch kbExchangeSearch kbExchange550 kbZNotKeyword2 kbOWASearch kbOWA550
Version           : :5.5
Issue type        : kbprb

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