Download the ACME client for windows here:
then unzip it into a directory, e.g. C:\win-acme and change into that directory. then paste the following command (but make sure to change the needed parameters before executing):
.\wacs.exe --source manual --host "mail.example.com,autodiscover.example.com" --certificatestore My --acl-fullcontrol "network service,administrators" --installation "iis,script" --installationsiteid 1 --script "./Scripts/ImportExchange.v2.ps1" --scriptparameters "'{CertThumbprint}' 'IIS,SMTP,IMAP,POP' 1 '{CacheFile}' '{CachePassword}' '{CertFriendlyName}'"
In this example we want a certificate for mail.example.com and autodiscover.example.com for the services IIS, SMTP, IMAP and POP. Important note for Hybrid Exchange configurations (synced to Office 365): you should use 0 instead of 1 in the --scriptparameters, which translates to the LeaveOldExchangeCerts input of the sample script.
More infos about this: https://www.win-acme.com/manual/advanced-use/examples/exchange