Edge IE mode list add URL with ? in it

We have a URL at work that we need to add to IE mode in Edge. We have multiple sites with the same begging URl (ex. www.contoso.com) but end with different string and we want them to act differently based on the end characters. The URL has a ? in the middle of the string and truncates anything after the ? when adding it to the IE mode list. 

Does anyone know of a way to be able to add the ? in the URL without it truncating?

Thanks,

Mike