Hi Ardmore,
It is a pitty that you can not finish your certification for the total package.
You can do a single exam, you will be only certified for that particular part of the package of three. This also means that you will not have the MCSA (or other titles) title.
For information on the exams/certification see below link.
https://www.microsoft.com/learning/
Regards,
Reshma
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