Wildcard on multiple platforms

Hi

We have Exchange Server for email, IIS for staff CMS and Apache web server for public.
We would like to use the same wildcard SSL cert on all the above, can anyone give me
some ideas as to how we can do this, we currently, jave a DigiCert SSL which allows
us to download copies of the SSL in different formats, which we think we can do with
the Lets Encrypt SSL, but the problem is the renewal, how do we renew the same SSL
on three different platforms at the same time?

Are the three “platforms”/services on the same server, or different servers?

Hi _az

all different servers