If you strictly require Microsoft Office for Mac 2011, the safest method is to purchase a used, physical retail box (CD/DVD) from marketplaces like eBay. Ensure the listing includes the original, genuine product key. Free Alternatives to Microsoft Office for OS X 10.7.5
While Microsoft does not offer a direct download anymore, you have three legitimate avenues: Microsoft Office For Mac Os X 10.7 5 Free Download
This guide explains which versions of Microsoft Office are compatible with Mac OS X 10.7.5, how to safely acquire them, and the best free alternatives available today. Supported Microsoft Office Versions for Mac OS X 10.7.5 If you strictly require Microsoft Office for Mac