An issue exists reporting this problem:
DE36233: Attachments in the Collaboration tab are not working properly in Internet Explorer
Steps to Reproduce:
1. Open PPM in Internet Explorer.
2. Go to Home > Projects.
3. Choose any project that has a document with an accented character, such as "Planificación". You can also add a document that has an accented character in its name.
4. Go to the Collaboration tab.
5. Go on the document with the accent.
6. Click on the name.
Expected Results: The system should prompt the user to download the file.
Actual Results: An error message displays that the webpage cannot be found.
This issue is addressed as from Patch 6 in Release 15.2.