What two types of users can sign in to Tableau Server and edit the permissions...

Editing permissions on a workbook in Tableau Server depends on the user’s role and the project’s permission settings. Since permissions are not locked (i.e., "Managed by Owner"), let’s dissect who can edit them:

Permission Model:

Not Locked: Owners of content (workbooks, data sources) can set permissions, and Project Leaders can override at the project level.

Site Roles: Define maximum capabilities (e.g., Viewer, Explorer, Creator).

Capabilities: "Set Permissions" is explicit—only certain users get it.

Option C (The workbook’s owner): Correct.

Details: The owner (typically the publisher) has full control over their workbook when permissions are Managed by Owner:

How: In the UI, go to Content > Workbooks > Actions > Permissions—owners can edit rules (e.g., grant Editor to a group).

Site Role: Minimum of Explorer (can publish) or Creator to publish, ensuring "Set Permissions" capability.

Why: Ownership inherently includes permission management unless locked.

Option D (Users set to Project Leader for the workbook’s project): Correct.

Details: Project Leaders are assigned via Content > Projects > Actions > Permissions > Set Project Leader:

Power: Can edit permissions for all content in the project, even if not the owner.

Site Role: Requires Site Administrator or Server Administrator (Creator/Explorer variants suffice).

Why: Overrides ownership in Managed by Owner mode—ensures project-level governance.

Option A (Users with project and workbook Viewer role): Incorrect.

Why: Viewer role (site-level) limits users to viewing—lacks "Set Permissions" capability, regardless of project/workbook rules.

Option B (Users with workbook Interactor role): Incorrect.

Why: "Interactor" isn’t a standard role—likely a misnomer for Explorer or Viewer with interaction permissions (e.g., Filter). No permission-editing rights exist here.

Why This Matters: Knowing who can edit permissions prevents access control gaps—crucial for collaborative or regulated environments.