What I can do for you:
Install an issued SSL, or I can also help with the issuing/reissuing process.
Troubleshoot SSL browser warnings for old SHA-1 algorithm, insecure links on the site, "incomplete CA chain", etc.
Install SSL certificate in your IIS server or Exchange server
Gig Extras you may need:
Troubleshoot an SSL – not required, but installing an SSL AND fixing links takes more time/efforts, so if you need both, it will be appreciated
SSL backup – I can keep the SSL files for six months or more in case that you lose them
I will install SSL certificate in Exchange Server