Some applications such as App Builder or Photo Gallery use the multiple file upload process to transfer documents. This process allows you to select multiple files or photos in a batch and upload them all at once. If, during the upload process, you are being prompted for authentication then it may be that your directory security needs to be modified in IIS.
- Navigate to IIS Manager on your intranet web server
- Expand web sites, expand your intranet web site
- Locate the MFU directory and click Authentication in the middle pane
- Change the security on the MFU directory to be Anonymous Authentication enabled, Windows Authentication Disabled
Once this is complete, close your browsers and test the upload process again on a new session.