SSL - New Wildcard and Existing Certs

HemmingSay

I've a quick question about SSL certs and only limited experience with them. I don't usually handle registration/hosting for my organisation - but it looks like that could be changing. Hoping someone here knows the answer to this.

We have two sites, both with the same domain name, hosted on separate servers with each having a single site SSL cert installed. i.e.:

a.domain.ie - cert expiring in 2016
b.domain.ie - cert expiring in 2017

User comes along and commissions a third site, c.domain.ie, again hosted separately. They want to enable https:// on it.

If I bought a wildcard cert *.domain.ie and installed it only on the c.domain.ie machine, is there any issues with continuing to use the a && b certs until they expire?

I know it would be better/cleaner to just update all the sites to use the same cert, but it'll causes delays because it means dragging more people into the job - the first two domains cover things like citrix and outlook web access.

Thanks!

HemmingSay

Excellent - cheers.

I thought maybe the process of requesting the widlcard could raise a flag on CA about the validity of the old ones or something.

Thanks!