Final answer:
The local folder in Mimecast that contains email addresses or domain names is called a Profile Group. This group is used for managing user permissions and applying specific policies according to the group's criteria.
Thus option 3. Profile Group is correct answer.
Step-by-step explanation:
The correct answer to your question is Profile Group. Within the Mimecast platform, the Profile Group is used to manage users and their permissions. It can contain email addresses or domain names which helps to group users based on certain criteria and apply specific policies to them.
For example, you might set up a Profile Group for your organization's executives that enforces stricter email security settings than the ones applied to the rest of your staff.
If "Profile Group" is related to a specific application, software, or platform, I recommend checking the documentation or help resources associated with that software for the most accurate and up-to-date information.
If "Profile Group" is a term specific to a certain field or industry, providing additional context or specifying the domain could help in offering a more accurate and relevant explanation.
Thus option 3. Profile Group is correct answer.