Error Opening PDF's in SharePoint 2010 when connected over https

hypnotx used Ask the Experts™
We have a SharePoint 2010 environment that we make available to via HTTPS.  Our default options for document libraries are to open docs in a browser, but recently our PDF’s have been causing an issue.  

When directly clicking on the pdf when you are not on the corporate network, you get the error “There was an error opening this document.  The filename, directory name, or volume label syntax is incorrect.”  This does not occur when on the network.  

Furthermore, we discovered a workaround that when you use the dropdown for the document and select View Properties and then click on the document link from that dialogue box the file will open without error.

Has anyone experienced this?
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So all of your internal clients that connect to sharepoint are able to open PDF without issue correct?

What version of IE our your clients using? Any Windows updates  or Adobe updates installed recently?

Is the sharepoint location trusted?  It's usually the document  type or Trust Center causing this.

- gurutc
Thanks guys for trying to help. I ended up opening a ticket with MS support and it was resolved by adding a SharePoint handler for Adobe PDF's to our SharePoint Web Front End.
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Gah! Those MS folks!!!
My be I am missing something here but I assumed that your PDF were working prior without the Adobe PDF handler?

 If so what changed?


Issue was resolved by Microsoft support.

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