We bought a certificate two years ago for service1.domain1.com and it is valid up to 2018. The problem is that domain was managed by third party and they are going to drop that sub domain.
My question is can we use the certificate bought for service1.domain1.com on service1.domain2.com?
Our server is IIS 7.5. I create a website and put service1.domain1.com and service1.domain2.com together in bindings on the same website. Both https://service1.domain1.com and https://service1.domain2.com seem to be working perfectly when I view them on browser. If we keep that way and our third party dropped their domain service1.domain.com, can https://service1.domain2.com still work with that certificate?