Problems accessing network files via OWA

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I have setup the remote fileserver access for OWA users however I am having problems actually downloading files via OWA. It is possible to add a network share into OWA and browse it without problems, likewise I can open files and WebReady happily renders them for viewing however when I (or any user), then tries to download said file I receive a " File could not be written to cache" error.

The odd thing is that it is possible to download the file if I first right click it and use the " Send via Email" option, then when the new window opens to create the email I have the option to view the file attachment - it is then possible to download the file when previewing it from this window. This is odd and makes me think it is a permissions issue as it seems like I can't download the file from the networked fileserver yet when I try and forward the file via email and Exchange copies the file to its server to create the email it suddenly becomes accessible and I can then download it.

This is all on Exchange 2007 SP3 running on Windows 2003 x64, I have added the fileserver to the list of allowed servers and added the domain to the list of domains to treat as internal (incase that was the issue), however I am properly stumped as to what is going on, if anyone has any ideas/suggestions they are greatly appreciated.

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Novak Wu


Please try the following steps to troubleshoot the issue.

1. Start Internet Explorer.

2. On the Tools menu, click Internet Options.

3. Click the Advanced tab, and then under Security, click to select the Do not save encrypted pages to disk check box .

4. Click Apply, and then click OK.

5. Then, please try to download the file via OWA again.

Hope this helps.


Novak Wu



Unfortunately none of those suggestions helped, the issue isn't with file attachments (which work fine), but with the Direct File Access feature that allows you to access network file shares via OWA.

Infact one of our users is currently working around the problem by emailing himself the files he needs which allows him to download the file once it is attached to an email (but he can't download it directly from the file share via Direct File Access).

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