Managing attachments and uploads

1. On the appserver, open each iMIS-related web.config file for editing.
   • iMIS default location: C:\Program Files\ASI\iMIS\net
2. Edit this line to add or remove file types in the value attributes.
   <add key="Communities.AllowedUploadFileTypes" value="DOC,PDF,TXT,HTM,HTML,GIF,JPG,PNG,RTF,ZIP,XML"/>
3. Refer to the list of the allowable file types that are specified in the web.config file entry.
4. Save the web.config file.
5. Repeat this process for each iMIS appserver where you want to change the allowable file types.
Click to view table

File Extension	File Type
AVI	Audio Visual Interleave
BMP	Microsoft device independent bitmap
DOC	Microsoft Word Document
EML	Outlook Express Electronic Mail
FLV	Flash Video File
GIF	GIF Image
HTM	HTML Page
HTML	HTML Page
JPE	JPEG Image
JPEG	JPEG Image
JPG	JPEG Image
MOV	QuickTime Movie
MP3	MP3 Audio
MPG	MPEG Movie
PDF	Adobe PDF File
PNG	PNG Image
PPT	Microsoft PowerPoint Presentation
RA	Real Audio File
RAM	Real Audio File
RPT	Crystal Report Template
RST	SSRS Template
RTF	RTF (Rich Text Format) File
TIF	TIFF Image
TIFF	TIFF Image
TXT	Text File
WAV	WAV Audio File
WMV	Windows Media File
WPD	Word Perfect Document
WRI	Windows Write Document
XLS	Microsoft Excel Workbook
XML	XML File
ZIP	Zip File

If your typical uploaded file size in your Resource Library or blog entries for example are larger than 100 MB, you can increase the maximum file size in the C:\Program Files (x86)\ASI\iMIS\Net\web.config file:

1. On the appserver, open the web.config file for editing.
2. Locate the <httpRuntime> element and modify the maxRequestLength attribute.
   <httpRuntime executionTimeout="3600" maxRequestLength="10240" />
3. Locate the <requestfiltering> element and modify the maxAllowedContentLength attribute.
   <requestLimits maxAllowedContentLength="10485760" />
4. Save the web.config file.

📘 Note

If you plan to upload files larger than 10MB, you must increase both the maxRequestLength and maxAllowedContentLength values.

• The MPE file type is sometimes used for MPG Video, but that file type is already in use for Mail Process Engine in iMIS. Rename .mpe files to .mpg in order to upload them to Communities.
• When a user attaches an XML file to a post and another user downloads it, the default file-opening behavior varies depending on the browser. In Internet Explorer, the XML file may take over the iMIS session, forcing the user to reconnect to the community through another browser window.

• In order to prevent denial of service attacks, if a user tries to upload a file that is greater in size than the maximum allowed for uploads, the Upload dialog box displays an error. If users report that the Upload dialog box displays an error, check to see if their file exceeds the file size limit.
• Be aware that increasing that value could result in a performance penalty on the webserver if the files being uploaded are too large for the server resources available such as available memory and CPU.
• Users working in the resource library on an iPhone, iPad, or Android cannot Download files. They can, however, Preview files on their devices.