Got error "File exceeds the 30720KB limit" when previewing file on Triofox web portal

When previewing a document on web portal, including viewing files in My Files, or previewing file in shared file/folder, user may hit the error "File exceeds the 30720KB limit"

The file preview is generated on the Triofox server. It uses server resources, especially when generating the file preview for large files. Thus Triofox puts a 30M limit here. The error user got means the file is too big for file preview. Please download the file to your device and open it from there.

The Triofox administrator can change the limit on root\web.config.

• On the Triofox server, go to Triofox installation folder\root. (default: C:\Program Files (x86)\Triofox\root)
• Make a backup of web.config
• Edit web.config
• Add the following setting in the file, within AppSettings section.
  <add key="MaxAllowedDocViewLimit" value="52428800" />
  
• Save the change.
• Open IIS Manager. Go to Application Pools. Recycle namespace application pool

It will change the size limit from default 30M to 50M. 

However, the file preview is generated on the Triofox server. After the change, please monitor the server performance. If you see performance is affected, delete the line to change it back to the default value.