What action should you take to inhibit Server1 from undergoing scanning in your Azure subscription?

To inhibit Server1 from undergoing scanning in your Azure subscription, creating an exclusion tag is the correct action to take. Exclusion tags are specifically designed to manage resources that should not be subject to certain automated processes, such as security scanning. By applying an exclusion tag to Server1, you effectively inform Azure services to bypass this server during vulnerability scanning operations or other assessments.

This is an important aspect of resource management in Azure, as it allows organizations to retain control over which assets are included in security evaluations. For example, you might want to exclude a server that is undergoing maintenance or one that holds sensitive data and should not be exposed to scanning.

In contrast, while creating an exclusion group could seem related, exclusion groups are typically utilized for broader categorizations rather than specifically excluding an individual resource from scans. Upgrading the subscription to Defender for Servers Plan 2 enhances security capabilities but does not inherently disable scanning for specific resources. Creating a governance rule may assist with compliance and policy enforcement but does not directly prevent scanning on individual servers. Therefore, using exclusion tags provides the most direct and effective method for excluding Server1 from scanning in this scenario.