To allow users to upload profile photographs & images within articles you'll need to configure windows permissions on your "Uploads" folder within the root of the InstantKB web application
You will need to ensure the windows account under which your InstantKB application runs under has both "modify" & "write" permission to both the "Uploads" folder.
For Windows Server 2008, 2012 & Windows 7/8/10 this is typically the MACHINENAME/NETWORKSERVICE build in system account. You can check which windows account your InstantKB is running under by locating the application pool within IIS you are using for your installation. Right click the application pol within IIS and goto Advanced Settings. The windows account will be shown on this page as shown below...
Configure Upload Folder Permissions
You'll need to navigate to your InstantKB installation folder and locate the "Uploads
From the properties dialog locate the "Security" tab and ensure the windows account listed above has the correct permissions as shown below...
The "Uploads" folder contains a number of child folders. You should ensure the permissions are propagated to these folders also. You can do this by using the Advanced button when applying permissions and ensuring the Propagate permissions to all child objects is checked,
By default we use the ASPNET or NETWORKSERVICE windows account for the permissions as this is the default windows account the ASP.NET worker process runs under. If you've configured IIS to use an alternative windows account for your ASP.NET application pool you'll need to ensure your custom windows account also has "write" & "modify" permissions on the "Uploads" folder.
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