It's a shame that there isn't a Server 2016 forum yet, so I'll just post my study notes here. The attachment at the bottom of this post includes nearly 30 pages of notes that I gathered by going through the material listed below. I put quite a lot of work into it so I hope others find it helpful!
I just got back from taking the 70-743 test which I was lucky enough to pass! Sometimes when I finish a test I think about how I would have studied differently if I had to do it all over again but this time around I think I focused on a lot of the correct material. I'll say that the MeasureUp test is definitely worth it! I think that a couple of the concepts used in that test appear in almost an identical way on the actual test.
Also, I wanted to say that I was surprised that the test is NOT broken up into three parts like the 70-417 was. It is just one big 59 question long test. On the print out at the end it is broken up into the three tests, but you don't get a pass/fail for each one individually. Also, my test started out with six questions that I was not able to go back and change my answers on. I didn't realize this was going to happen and felt like I rushed through them a bit faster than I would have if I had realized this. Might be worth keeping in mind.
70-743 Skills Measured:
https://www.microsoft.com/en-us/learning/exam-70-743.aspx
Microsoft Press book:
https://www.amazon.com/Exam-70-743-Upgrading-Your-Skills/dp/0735697434
Server 2016 videos:
https://www.youtube.com/watch?v=rdtnsMSnke0 – Top 10 Server 2016 features
https://www.youtube.com/watch?v=MmgrwNMyUMs – What’s new in Server 2016
https://www.youtube.com/watch?v=K3H0Uq1sayg – Remotely Managing Nano Server
https://www.youtube.com/watch?v=FYFm1osOb2k – 20 better ways to perform Server admin using PowerShell (Pretty basic)
https://www.youtube.com/watch?v=BHXOTNIj7eQ – Hyper-V & Clustering
https://www.youtube.com/watch?v=L_8xewWsRSo – Containers
https://www.youtube.com/watch?v=BNJ8JVXEVhU – Microsoft Ignite AD FS
https://www.youtube.com/watch?v=6MQWBqwIeHI – Microsoft Ignite 70-740
https://www.youtube.com/watch?v=YeRRmVY6BLI – Microsoft Ignite 70-741
https://www.youtube.com/watch?v=Dj1sinZP0VY – Microsoft Ignite 70-742
https://www.youtube.com/watch?v=tI_VScdk7kU – Very short Storage Replica video
https://www.youtube.com/watch?v=3fD4VHOGVbo - Longer Storage Replica video (because Storage Replica rocks!)
https://www.youtube.com/watch?v=MTr7ZMmQhW0 - Data Deduplication (Server 2012 but still very helpful)
https://www.youtube.com/watch?v=fIEfUTMbjkQ - Software Defined Networking (IPAM, Network Controller, Software Load Balancer, Datacenter Firewall)
https://www.youtube.com/watch?v=TkUOBsuU8QQ - Configure IPAM
https://youtu.be/SiCDullXeKo?t=16m15s - DNSSEC
https://www.youtube.com/watch?v=0XhOiXKV8k4 - Cluster Aware Updating (Server 2012 again, still good)
https://www.youtube.com/watch?v=ySy4g9M50ao - Way more than you’ll ever want to know about Hello for Business (formerly Windows Passport)
https://www.youtube.com/playlist?list=PLKWqPrqG4yyRho-5MHpjddMwaygRgLEPE – Misc training videos
Microsoft Virtual Academy (MVA)
https://mva.microsoft.com/search/SearchResults.aspx#!prod=Windows%20Server&prodv=Windows%20Server%202016&lang=1033https://mva.microsoft.com/en-US/training-courses/whats-new-in-windows-server-2016-16457https://mva.microsoft.com/en-US/training-courses/mastering-microsoft-certification-exam-prep-16601
Study guide:
exam 70-743, studyguide 70-743 | Marius Sandbu
Practice test:
Microsoft Certified Official Practice Test 70-743 (beta): Upgrading Your Skills to MCSA: Windows Server 2016 | mindhubUpgrading Your Skills to MCSA: Windows Server 2016
Booster pack:
https://www.mindhub.com/MCP-bundles-practice-test-vouchers-p/Microsoft_Exam_Replay_PT.htm?utm_source=MSFTmarketing&utm_medium=msft_offers&utm_content=weblink&utm_campaign=Exam_Replay