Why is it not possible to upload documents that are larger than 20MB?
On the Web Server hosting the DocuWare Platform Services you have to open the file "web.config" (default path: C:\Program Files (x86)\DocuWare\Web\Platform\web.config).
Search within this file for "security" and add the text marked in red:
<requestLimits maxAllowedContentLength="209715200" />
<windowsAuthentication enabled="false" />
This value equals 200MB and raises the maximum upload size to that value.