Having MS certification is not mandatory but I can say that it is useful and added advantage for sure.
- When you search for a job, you can stamp logo of your certification on top of your CV.
- Employers are going to give you preference to you because you have cetification that shows you have reached certain level of competence with Microsoft Technology.
- If you are an MCSE in your fav microsoft technology, you may be earning well than what other earn.
(I personally have cleared 2 exams and planning for 3rd one which would make me MCSA)
Please refer simillar thread:
Are IT certifications worth it?
Cheers,
Vaibhav Chaudhari