No providers are found in the folder “%1”. The Autodiscover service is unable to process any valid requests. Check Autodiscover service configuration.

Details
Product: Exchange
Event ID: 101
Source: MSExchange Autodiscover
Version: 8.0
Symbolic Name: ErrCoreNoProvidersFound
Message: No providers are found in the folder “%1”. The Autodiscover service is unable to process any valid requests. Check Autodiscover service configuration.
   
Explanation

This Error event indicates that the Microsoft Exchange Autodiscover service is unable to process requests from the Outlook or mobile clients because the Outlook or mobile provider file was unavailable in the Autodiscover virtual directory configuration. Therefore, Outlook or mobile clients will be unable to access Exchange services such as the Availability service. This event may be caused because the Autodiscover service is not configured correctly on the Microsoft Exchange Client Access server.

   
User Action

To resolve this error, do the following on the Exchange Client Access Server.

  • Check to see whether Autodiscover service is configured correctly.

  • Install or reinstall the provider file, Microsoft.Exchange.Autodiscover.dll in this path: D:\Program Files\Microsoft\Exchange Server\ClientAccess\Autodiscover\bin.

  • If these options do not help in resolving the issue, contact Microsoft Product Support Services. For more information, visit the Contact Us page of the Microsoft Help and Support Web site.

For more information about the Autodiscover service, see Managing Autodiscover.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.

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