HOWTO: Enable Sharepoint .chm Upload

HOWTO: Enable Sharepoint .chm Upload

In STS 1.0 you could upload to a document library any file you liked. This obviously had the drawback that you could upload a script (say) and by clicking on it start it carrying out its functions. The usual way round this was for the Administrator to request that such “dangerous” file types (scripts, exes etc.) should be zipped and then the zip file uploaded to the document library.

In WSS there is a set (long) list of file types that can not be uploaded to a document library.

This file () can of course be amended by the administrator – usually I suspect to reduce the list of restricted file types rather than to increase the number. As I wrote enough the default list is *very* long.

The file is ….60/CONFIG/DOCEXTFL.XML

To change the list of non-uploadable files you can either amend the file itself (and probably do IISRestart to make it work) or you can use the User Interface *on the server* as follows (the example being removing chm files from the list).

1. Programs
2. Administrative Tools
3. Open SharePoint Central Administration
4. Under Security Configuration, click Manage blocked file types
5. Remove the line for CHM and click OK