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Using IE8, OWA attachment (docx, xlsx) wants to be saved as zip file.

Posted on 2009-04-10
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Last Modified: 2013-12-08
I am having a problem with downloading Office 2007 attachments (.docx, .xlsx) in OWA being saved as .zip.
I found an article on this site about adding MIME types for Office 2007 extensions into IIS6. I applied the fix and it is working for IE7 users. Everyone using IE7 can now download .docx files correctly. However, IE8 users are still having the problem.
We are running Windows Server 2003, IIS6, and Exchange 2003. All users have Office 2007 Pro installed.
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Question by:Futurenet_Solutions
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Expert Comment

by:brislane
ID: 24116541
What have you the MIME types setup as ? They should be as follows :

.xlsx       application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
.docx       application/vnd.openxmlformats-officedocument.wordprocessingml.document
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Author Comment

by:Futurenet_Solutions
ID: 24116566
I added all of these:

.xlsx - application/vnd.openxmlformats-officedocument.spreadsheetml.sheet  
.xltx - application/vnd.openxmlformats-officedocument.spreadsheetml.template  
.potx - application/vnd.openxmlformats-officedocument.presentationml.template
.ppsx - application/vnd.openxmlformats-officedocument.presentationml.slideshow
.pptx - application/vnd.openxmlformats-officedocument.presentationml.presentation
.sldx - application/vnd.openxmlformats-officedocument.presentationml.slide
.docx - application/vnd.openxmlformats-officedocument.wordprocessingml.document
.dotx application/vnd.openxmlformats-officedocument.wordprocessingml.template
.xlam application/vnd.ms-excel.addin.macroEnabled.12
.xlsb application/vnd.ms-excel.sheet.binary.macroEnabled.12
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Expert Comment

by:JWL5537
ID: 24116894
I'm experiencing the same problem and have added the same MIME in IIS.
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Accepted Solution

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Futurenet_Solutions earned 0 total points
ID: 24118906
I think I have figured it out.
If you add the OWA site to the trusted sites in IE8 it allows you to download the attachment correctly.
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Author Comment

by:Futurenet_Solutions
ID: 24118975
Now I am going to create a GPO for adding the OWA site to the trusted sites in IE.
I found this site for creating a GPO for trusted sites:
http://windowsitpro.com/article/articleid/78049/jsi-tip-6644-how-can-i-use-group-policy-to-add-a-site-to-the-trusted-sites-zone.html
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Expert Comment

by:JWL5537
ID: 24118984
I tried putting it in trusted sites and it still won't open.  It's asking me to open the zip file and then save the excel file.
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Author Comment

by:Futurenet_Solutions
ID: 24119006
Maybe a silly question.....but you did make sure to restart IIS after adding the new MIME types?
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Expert Comment

by:JWL5537
ID: 24119105
Yes, multiple times.
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Expert Comment

by:JWL5537
ID: 24119115
Sorry, one thing of note is that I removed the registry entries for Level2 File Types and Level 2 Types.
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Author Comment

by:Futurenet_Solutions
ID: 24129871
I did not do that. I only added the MIME types and restarted IIS. Now it is working for me.
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Expert Comment

by:JWL5537
ID: 24129965
I put the MIME Reg keys back in, restarted IIS and am back to getting the message "To open this attachment you must save it to disk....".  I went back and re-copied the MIME Types back in and restarted IIS again.  Still no luck.
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Author Comment

by:Futurenet_Solutions
ID: 24130404
I still get that message also. However, now when i right-click and chose "save target as..." is saves it correctly.
Before adding the MIME types and adding OWA to trusted sites in IE8, when I would select "save target as..." it would save it as a zip.

As far and getting rid of the "To open this attachment you must save it to disk...", I have not figured that one out yet.
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Expert Comment

by:janiemo
ID: 32355163
To add to the confusion on this, when I create and email in MacOS using Office 2008 and then send it from Entourage, it opens just fine from OWA on Vista with IE8.  Explain that one.
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Expert Comment

by:JRig
ID: 32356801
I'm having this issue too.  MIME is correct, site added to trusted sites list.  Still no go.
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