What cmdlet is used to modify the default template and customize parts of encrypted email messages?

The cmdlet used to modify the default template and customize parts of encrypted email messages is indeed the Get-OMEConfiguration cmdlet. It is particularly important for an administrator managing encrypted email, as it allows access to and modification of existing configurations for Office Message Encryption (OME).

By using Get-OMEConfiguration, administrators can retrieve the current settings of the encryption templates that are already established. Since these templates govern how encrypted messages appear to the recipients and what options are available, being able to modify them is crucial for ensuring the messages align with organizational policies, branding, or specific client requirements.

In this context, the correct use of Get-OMEConfiguration ensures that any changes needed for the default email templates and their customization can be implemented effectively, thereby enhancing the usability and compliance of the encrypted communication process.