IE11 cannot delete cached pdf file

Dear Sir,

Our company website contains some static PDF file. These PDF files will be replaced quarterly with the same filename.

Users found that the PDF content remain unchanged. IT support told them to clear the IE cache (internet options -> Browsing history -> delete -> all checked)  and download the PDF file but the file still the same.

We opened the "Temporary internet Files" folder, we have found that the PDF file is still there after the delete.

Therefore, we select all the files and press delete button. The file is now "real" deleted. The users can read the updated PDF files.

What's going on? Why this happens? Is it a IE bug? Please suggest.

Thank you very much.

With regards,
Wataw
WatawAsked:
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Dave BaldwinFixer of ProblemsCommented:
It is not unusual for files to be cached and seem to be difficult to get rid of.  This isn't just a problem for IE either.  I would recommend that the replacement files include the date at the end of the filename so they won't match the files in the browser caches.  Something like "Company2015-1.pdf" where the "-1" could mean the first quarter of the year and "-2" for the second quarter.
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Sudeep SharmaTechnical DesignerCommented:
You could rather provide them a small batch script which could wipe all the data which is inside the "Temporary internet Files" folder.
All they have to do is run it once before start working, or when they need the new content and not the cached ones.

example:
del /f /s /q "%UserProfile%\AppData\Local\Microsoft\Windows\Temporary Internet Files\"

I have tested the above and it works on Windows 7 64bit. But addition to it are welcomed.

Save the above line on a notepad and save the file with bat extension and ask the User's to run it.

Sudeep
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WatawAuthor Commented:
Dear All,

Any way to trick iis server not cache PDF file only? We are using IIS 8 on Windows 2008 R2. Thank you.

With regards,
Wataw
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Dave BaldwinFixer of ProblemsCommented:
I thought you said that IE was caching the file.  That's not something that IIS is doing.
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