I have found my own answer:
https://www.microsoft.com/en-us/learning/mcsa-windows-10-certifications.aspx
https://www.cbtnuggets.com/blog/certifications/microsoft/why-microsoft-retired-the-windows-10-mcsa
"Dhelzky_R
Microsoft Agent | Moderator
Replied on December 11, 2018
Hello DarkOne2488,
It is correct that MCSA: Windows 10 certification which requires exam 70-698 and 70-697 will retire on March 31, 2019.
These exams will be replaced by exams MD-100 and MD-101 that will become available as beta exam.
Note that these replacement exams will not satisfy the requirements of MCSA: Windows 10.
Hence, I would suggest to complete exams 70-698 and 70-697 before they retire."