Links to an Office file, such as a Word file or spreadsheet, may not open correctly on an Apple Mac computer.
When a link is sent to an Office document to a person using a Mac, the document link will not open correctly. The Outlook software recognizes the Office extension and attempts to open the corresponding Office app rather than use the browser to view the document.
There are several workarounds for this issue:
Right click on the link and select Open Link to open the link in a browser.
Remove the document name from the link.
Replace the period in the document name with an underscore.
Any of those actions will open the file correctly.