説明

New-ExchangeCertificate: 証明書の更新要求を作成します。
Import-ExchangeCertificate: 新しい証明書をインストールします。
Enable-ExchangeCertificate: 新しい証明書を Exchange サービスに割り当てます。
参照：
https://docs.microsoft.com/en-us/powershell/module/exchange/new-exchangecertificate?view=exchange-ps
https://docs.microsoft.com/en-us/exchange/architecture/client-access/import-certificates?view=exchserver-2019
https://docs.microsoft.com/en-us/exchange/architecture/client-access/assign-certificates-to-services?view=exchse