If the SAS Add-In for Microsoft Office does not appear at all in that list, then it is not installed (or registered) properly. I would suggest the following two options.
1. Run the SwitcherUtility.exe from the add-in's installation directory. This will set up the registry so that Excel can find the add-in. If you look at item "C" from the accepted solution on this discussion, it lists some arguments that you can pass in that will help make sure that the registry gets updated properly.
2. Re-install the add-in. Perhaps some files are missing or the registry just needs to be wiped clean and then re-registered when you do the install. Hopefully this isn't needed, step #1 should be able to fix most registry issues.
Other things you may need to consider is if you installed the proper bitness of the add-in. It must match the bitness of Office, not the bitness of the OS. Also, you have to be running the desktop version of Excel, not the web version. The web version doesn't support COM add-ins.
Hope this helps,
Tim Beese
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