Update 2020
Starting with Adaxes 2020.1 it is possible to approve/deny request right from the email notifications. For details on how to enable the feature, have a look at the following help article: https://www.adaxes.com/help/EnableApproveViaLink.
Original
Hello,
Currently not, but the request is already in our backlog, and it is a very popular one. We'll keep it in mind when deciding on features for future releases.