Create the certificate for your environment with let's encrypt

To provide a valid certificate for our tasks, we need to install the Posh-ACME PowerShell module to use let's encrypt as our certificate provider. The certificates are valid for three months, without any cost. If you want to use your environment for longer, you just need to renew the certificate.

Find the module description and further information at the following source: https://docs.microsoft.com/en-us/office365/enterprise/base-configuration-dev-test-environment 
  1. With the following command, you install the module:
# Install for all users (requires an elevated PowerShell)
Install-Module -Name Posh-ACME

# Install for current user
Install-Module -Name Posh-ACME -Scope CurrentUser ...

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