The Enforce disk quota limit machine setting should be configured correctly. Determines whether disk quota limits are enforced and prevents users from changing the setting. If you enable this setting, disk quota limits are enforced. If you disable this setting, disk quota limits are not enforced. When you enable or disable the setting, the system disables the "Deny disk space to users exceeding quota limit" option on the Quota tab so administrators cannot make changes while the setting is in effect. If the setting is not configured, the disk quota limit is not enforced by default, but administrators change the setting. Fix: (1) GPO: Computer Configuration\Administrative Templates\System\Disk Quotas\Enforce disk quota limit (2) KEY: HKLM\Software\Policies\Microsoft\Windows NT\DiskQuota\Enforce