Don't know if you are still looking into this, but I assume you earned your MCSA in Server 2012 during this process. If so, you can now take any exam listed here: https://www.microsoft.com/en-us/learning/mcse-cloud-platform-infrastructure.aspx
If you take those you will get the new MCSE: Cloud Platform and Infrastructure cert which is the new version of the MCSE Server Infrastructure. I just did that this morning and I got my certification. It doesn't expire anymore and you can show continued
learning each year by passing an additional exam.