|Message:||Error “%1” while loading the assembly “%2”.Stack Trace:%3. This error may occur because the provider file is corrupt, is in an incorrect format, or has insufficient permissions.|
This Error event indicates that the providers could not be loaded for the Microsoft Exchange Autodiscover service. Providers are components that Autodiscover calls when a client like Outlook sends a request. Autodiscover will direct the request to a provider for processing. The error can be caused because the provider file is corrupted or is in an incorrect format, or the provider file has insufficient permissions (that is, Autodiscover does not have sufficient permission to read the file).
To resolve this error, do one or more of the following:
Contact Microsoft Product Support Services. For more information, visit the Contact Us page of the Microsoft Help and Support Web site.
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.