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220-802 · Question #642

Joe, an employee, has just migrated from the Marketing department to the Accounting department and cannot save files to the Accounting share. He is a member of both the Marketing and Accounting…

The correct answer is A. Remove Joe from the Marketing group. Because NTFS Deny permissions override Allow permissions, Joe's membership in the Marketing group (with Deny All) blocks his access despite also being in the Accounting group.

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Question

Joe, an employee, has just migrated from the Marketing department to the Accounting department and cannot save files to the Accounting share. He is a member of both the Marketing and Accounting security groups. A technician discovers the following permissions are in effect for the Accounting share:

Share permissions: Everyone - Full Control NTFS permissions: Accounting - Full Control, Marketing - Deny All Which of the following should the technician do to enable Joe to save files to the Accounting share without compromising security?

Options

  • ARemove Joe from the Marketing group
  • BAsk Joe to resave the file, as the permissions are correct
  • CGrant the Accounting group Full Control share permissions
  • DRemove the Deny permission for the Marketing group

How the community answered

(21 responses)
  • A
    62% (13)
  • B
    24% (5)
  • C
    10% (2)
  • D
    5% (1)

Why each option

Because NTFS Deny permissions override Allow permissions, Joe's membership in the Marketing group (with Deny All) blocks his access despite also being in the Accounting group.

ARemove Joe from the Marketing groupCorrect

NTFS Deny permissions take explicit precedence over Allow permissions across all group memberships for a user. Since Joe is still a member of the Marketing group, the Deny All NTFS permission applied to that group blocks his access to the Accounting share, regardless of the Accounting group's Full Control allow. Removing Joe from the Marketing group eliminates the Deny and allows the Accounting group's Full Control permission to take effect.

BAsk Joe to resave the file, as the permissions are correct

The permissions are not correct for Joe's current role; the Deny from Marketing overrides his Accounting access, so resaving will not resolve the issue.

CGrant the Accounting group Full Control share permissions

The share permissions already grant Everyone Full Control, so changing the Accounting share permission adds no benefit and does not address the NTFS-level Deny conflict.

DRemove the Deny permission for the Marketing group

Removing the Deny permission from the Marketing group would affect all Marketing group members and could grant unintended access to the Accounting share, compromising security.

Concept tested: NTFS Deny permission precedence over Allow with group membership

Source: https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/manage/understand-security-groups

Topics

#NTFS permissions#security groups#deny permissions#least privilege

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