Exchange 2010 - OWA .mht .mhtml can't save - attachment.ashx

Hi All,

 I have issue  with OWA and attachments in mht & mhtml format

I can't open or save this attachments in any browser.

When trying to save i get attachment.ashx file with zero size. How can i fix this?

Exchange 2010 SP3 UR3 \ Windows 2008 R2

Thanks

Best Wishes, Andrew Golubenkoff