The issue you are experiencing with Excel not opening documents downloaded via WebDAV, while Word works correctly, may be related to the configuration of the server or the settings in Excel. Since you mentioned that the error only occurs in version 2509 of Excel and not in version 2403, it could indicate a regression or a change in how Excel handles WebDAV connections in the newer version.
To troubleshoot this issue, consider the following steps:
- Check for Updates: Ensure that your version of Excel (2509) is fully updated. Sometimes, issues are resolved in subsequent patches.
- Clear Cache: Clear any cached data in Excel that might be causing conflicts with the WebDAV connection.
- Test with Different Paths: If possible, test with different WebDAV paths to see if the issue is consistent across all paths or specific to certain ones.
- Network Configuration: Verify that there are no network issues or configurations that might be affecting Excel's ability to connect to the WebDAV server.
- SSL Configuration: If your WebDAV server supports SSL, ensure that Excel is configured to use HTTPS instead of HTTP, as some versions of Office applications may have restrictions on non-SSL connections.
If these steps do not resolve the issue, you may want to report the problem to Microsoft support for further assistance, especially since it appears to be a version-specific issue.
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