If you'd like to access Aftersend tracking information outside of Outlook, you can easily install Aftersend Viewer, a desktop edition of Aftersend.
First, navigate to https://app.aftersend.com/dashboard and sign in.
The next step is dependent on your browser, but it is likely to look similar to one of the following:
On Microsoft Edge:
Select the "Install Aftersend" button in the URL box and then install.
On Google Chrome:
Select the "Install Aftersend" button in the URL box and then install.
Once you have installed Aftersend Viewer, you can find it with other programs in your start menu or search: