Some customers do not have access to the Microsoft store. If you are unable to install our App from the Microsoft store you may follow the instructions here to install it (bypassing the store is called 'side loading').
Please note that apps that are sideloaded are not guaranteed to receive future updates. Only apps installed from the official Microsoft store can receive automatic updates.
The XML manifest file can be download from here. Once downloaded follow the instructions for your operating system below.
Here is a direct link to the Microsoft site with instructions on sideloading CloudExtend Excel for Salesforce on a Mac.
Please be sure to locate the section on the page with the header "Sideload an add-in on Office for Mac".