The default maximum is set to 4MB to prevent possible Denial of Service attacks.  The Application web.config files determines the maximum file upload size.

Note: Whether you are hosted by Blackbaud or not, you still must go to edit the Documents part and change the maximum file size as a second step

If Blackbaud hosts your Application:
  • Click Chat with Support and reference this article. Support can work with our network resources to update the the maximum to 10MB, temporarily. Please provide the approximate timeframe for which you'll need to increase the file size. This cannot be a permanent fix.
  • After support confirms the maximum file size is increased and you'll be using a Documents Part to upload files:
    1. Log into the Application.
    2. Navigate to Site Explorer- Parts.
    3. Filter the list to display Documents parts by selecting Documents in the Type drop-down menu.
    4. Click the Search button.
    5. Click the pencil icon next to the appropriate part in the list to edit the part.
    6. Change the Maximum File Size text field to reflect the maximum file size defined in the web.config file in the previous steps above. 
    7. Click Save.

If Blackbaud does not host your Application:

To prevent possible Denial of Service attacks, the Web.Config file specifies a limit to the size of the files you can upload. The default is set to 4,000 KB but can be adjusted up to 10,000 KB. We do not recommend exceeding this size. Before changing the maximum permitted file sizes, review Microsoft's Knowledgebase article. Note: We provide links to third-party websites in an effort to help you resolve your issue. We are not responsible for the information on third-party websites, and we cannot assist with implementing resolutions from these websites.

  1. Before editing or deleting any files referenced in the remaining steps, back up the files.
  2. Open the folder where the Application was installed. The default location is C:\Program Files\Blackbaud\NetCommunity\.
  3. Locate the Web.Config file. 
  4. Open the Web.Config file in Notepad.
  5. Locate the following line in the file: <httpRuntime useFullyQualifiedRedirectUrl="true"/> 
  6. Change the line to: <httpRuntime useFullyQualifiedRedirectUrl="true" maxRequestLength="[ENTER SIZE HERE]"/>

    Note: Enter the appropriate size to allow in the section"ENTER SIZE HERE" in KB. The value must not exceed 10,000 KB for security reasons.
    For 10,000 KB (Maximum recommended size) your file should look like this: <httpRuntime useFullyQualifiedRedirectUrl="true" maxRequestLength="10000"/>
  7. Save and close the file. 

Note: You do not need to restart IIS because web.config files are automatically recompiled by IIS when they are modified.


If the intent of the file size increase is to allow the upload of files larger than 4 MB within a Documents part, follow these additional steps:

  1. Log into the Application.
  2. Navigate to Site Explorer- Parts.
  3. Filter the list to display Documents parts by selecting Documents in the Type drop-down menu.
  4. Click the Search button.
  5. Click the pencil icon next to the appropriate part in the list to edit the part.
  6. Change the Maximum File Size text field to reflect the maximum file size defined in the web.config file in the previous steps above. 
  7. Click Save.