Exploratory testing is one of the feature Microsoft packaged in Microsoft Test Manager (MTM). MTM require license to Visual Studio Ultimate/Enterprise, which prevented many testers from using this feature. Exploratory testing allows the tester to test the application in an ad-hoc manner and find issues. MTM allow the tester to capture the screen shots, record the steps, capture the running environment details and annotate the screens, and log bugs directly from exploratory test windows.
Now, MS is released the same power packed features as a Chrome plug-in in Visual Studio market place. Download and install the plug-in and connect to TFS to log the bugs directly. Tool allow the testers to capture many details as part of the bugs.
Install the same from https://marketplace.visualstudio.com/items/ms.vss-exploratorytesting-web