Solution for Davex.dll Error Problems

In Microsoft Exchange 2003, the DLL davex.dll file handles the communication between the back-end server of Exchange and the Internet Information Services (IIS). It is a custom WebDAV (Web-based Distributed Authoring and Versioning) implementation used in Microsoft Windows.

The davex.dll file works as the DLL responsible for communicating with IIS whenever a request is authenticated through the back-end server of Exchange. To complete the processing of requests sent to Microsoft Exchange and send back a response, the davex.dll file collaborates with the file epoxy.dll and the exoledb.dll file.

When a request is sent on the back-end, IIS is initialized to determine the website and path to Exchange virtual directory. This request requires authentication using LogonUserEX API. Once the logon method is determined, IIS passes the request to the davex.dll file. The davex.dll file will then query the Global Catalog to determine the user’s SMTP address and mailbox information and check to see if the information matches.

After processing the request, the file davex.dll will pass it to the epoxy.dll file that is responsible for Inter-process communication between Exchange and IIS. The epoxy.dll module will then pass on the request to exoledb.dll that will access the Information Store.

The requested data or information will be retrieved by exoledb.dll from the Information Store and pass it on to epoxy.dll, which will then pass it to the davex.dll process, file. The Exchange front-end server then receives the data from davex.dll file, which goes through the TCP 80.

To relay the data back to the client over the appropriate port, the Exchange front-end server is used.

The separation of DLLs for Exchange’s front and back server is an ideal architecture both for WebDAV and IIS. In this set-up, it is possible to disable WebDAV for IIS without disabling Exchange’s WebDAV implementation.

In addition to its functions for WebDAV, the davex.dll file also responds to Outlook Web Access (OWA) requests. As part of OWA, the davex.dll file allows users direct access to their mailbox, calendar, public folder and the Global Address List (GAL) from any Web browser that support HTTP 1.1 such as Microsoft Internet Explorer 3.0 or Netscape 3.0.

Davex.dll is created by:
Microsoft Corporation
Microsoft Support Site

Known file path:
C:\ Windows\ system32\ davex.dll

What is a DLL?

Your operating system comes pre-installed with Microsoft DLL’s and most third party programs also install DLL’s.

DLL (Dynamic Link Library) is Microsoft’s implementation of the shared library concept. Meaning there’s a DLL library on your computer and each DLL can be shared among different Microsoft and third party programs. This shared library method helps your computer run faster by having fewer operations running at the same time.

When a DLL is missing or corrupt it may show an error message and programs may fail or crash.

Because DLL’s are shared, one missing or corrupt DLL may affect multiple programs on your computer.


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