Automatically trust updated domain certificates on MacOS

I work for a large company and our security certificates update regularly. Sometimes we get prompted to accept the new ones, but not always. For example; our rootca was updated a few months ago and when the old one expired users could not use Outlook of Skype for Business. Even if they got the new cert it would be marked as untrusted.  What we are trying to figure out is if there is a way to force MacOS to recognize when there is a new certificate available or if there is a way to use scripting to automatically trust new certificate for our domain.  We do not have any infrastructure to deploy configuration profiles and there is no foreseeable intentions to implement anything. What are our options?
Eric KawalerSr. ICDS AnalystAsked:
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AntzsInfrastructure ServicesCommented:
Since your cert is not trusted, I would assume you are using a self sign cert.  And because there is no plan to deploy or implement anything, the best option I can think of is to purchase a certificate which is signed by a trusted Certificate Authority(CA).  Something like VeriSign or GlobalSign, etc.  Most reputable CA would have their root cert already installed on the MacOS.
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Ashton LynnCommented:
We are using GlobalSign for the company. It performs CA upgrade every time. Perhaps, you need to check the list of available certificates on https://support.apple.com/en-us/HT202858 and www.hireessaywriter.org MacOS study questions reviews.
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