Hi @Tee356 ,
Have you checked this article? Contains specific steps for using PowerShell commands, I hope it will be helpful to you.
https://www.alitajran.com/install-exchange-certificate-with-powershell/
Regards
Shaofan
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.