I’ve got a quandary with one user who is attaching a .pdf to an email, using the “Attach File” menu, but when the file is attached and sent/delivered, the attachment has been renamed with a .crdownload postpended (i.e., changing the file’s type).  So, email now has “somefile.pdf.crdownload” attached rather than the original file of “somefile.pdf”.

Any idea what’s causing this oddity?  The attached file was recently downloaded from another system, but clearly shows the filename as ending in .pdf.  The impact is that recipients get the, perhaps unknown filetype, unless the .crdownload has been previously associated with an application (Acrobat Reader in our case).

Thanks for any guidance or suggestions!

Edited to clarify that this is Windows 10 environment with installed MS 365 apps.

​I’ve got a quandary with one user who is attaching a .pdf to an email, using the “Attach File” menu, but when the file is attached and sent/delivered, the attachment has been renamed with a .crdownload postpended (i.e., changing the file’s type).  So, email now has “somefile.pdf.crdownload” attached rather than the original file of “somefile.pdf”.Any idea what’s causing this oddity?  The attached file was recently downloaded from another system, but clearly shows the filename as ending in .pdf.  The impact is that recipients get the, perhaps unknown filetype, unless the .crdownload has been previously associated with an application (Acrobat Reader in our case). Thanks for any guidance or suggestions! Edited to clarify that this is Windows 10 environment with installed MS 365 apps.  Read More

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