I am not a great fan of certifications. I did not do a lot of them, my last certifications are based on the MCSA 2003 path. As I am working with Azure since a couple of years now and around 1 year with Azure Stack I thought it would be nice to give the Azure Stack certification a shot during the beta exam 70-537.
Prepare for the 70-537 Configuring and Operating a Hybrid Cloud with Microsoft Azure Stack
Microsoft has, as always, listed the skills that will be measured during the exam listed on their page reflecting the information about the certificate Exam 70-537 Configuring and Operating a Hybrid Cloud with Microsoft Azure Stack
As the 70-537 is pretty new there is (very) limited training material available online. Microsoft has published a course at OpenEDX here, available for FREE until 30th June 2018. Another one is lised at Pluralsight. At this moment there is nothing listed on MeasureUp nor Udemy. Training locations starts to list the training which will prepare you for the exam.
Advise to prepare for the Azure Stack exam
My advise to prepare for the Azure Stack exam is to follow both the online courses from OpenEDX and Pluralsight. I also advise you to get some hands-on experience on Azure Stack either by the Azure Stack environment you have at work or by grabbing some hardware and install Azure Stack Development Kit. Furthermore some basic Azure (Public) knowledge could also come in handy during this exam.
When you have the feeling you know your way around in Azure Stack plan the exam and surprise yourself!