Filemaker snapshot links are blocked by Microsoft OWA (OutlookWebAapplication) webmail - by design XML content is blocked.
"If a user tries to open an allowed file type, not an XML file type, that contains any embedded XML, Outlook Web Access will block the file and not allow it to be opened or saved to the user's local computer.
Outlook Web Access will block .mht files even if .mht is in the allowed files list. Files that are of the.mht type cannot be opened or saved to the user's local computer.
The behavior you described is by design. After some research, I find the only workaround for this issue is zip the attachment. I will update the post if I find another way to achieve it."
Anybody tried the zip workaround ?
Your exchange server needs to be configured with allowable attachments.
This KB is a bit dated (exchange server 2003) but demonstrates the same method:
basically, you need to add .fmp12, .fmpsl and any other filemaker extensions to the approved list.