Problem
You cannot view Microsoft Visio files that have the .vsdx file type, even though you can view Visio files that have the .vsd file type.
Common Cause
The MIME type is not set for the .vsdx file type.
Solution
Using IIS Manager on the application server, an administrator adds the MIME type for the .vsdx file type. For instructions and important information, please see Define MIME types.