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Autoenrollment Functions

This section discusses various functions performed by the autoenrollment process on Active Directory domain-joined machines.

Download of Active Directory Certificates and Trust Objects

Autoenrollment automatically downloads and manages trusted root certificates, cross-certificates, and NTAuth certificates from Active Directory into the local machine registry for domain-joined machines. All users who log on to the machine inherit the trust and downloaded certificates that are downloaded and managed by autoenrollment.

Deleting Expired and Revoked Certificates

Autoenrollment deletes expired and revoked certificates in the userCertificate attribute on the user object in Active Directory. This feature can be enabled through user or machine Group Policy to help ensure that only valid and active certificates are used for encryption operations.

The exit module on the Windows Server 2003 CA also helps to manage the user account in Active Directory, but only deletes expired certificatesit does not remove revoked certificates due to performance reasons. In general, there is no value in publishing a signing certificate to the user object in Active Directory, except for purposes of record-keeping.

Managing User Certificates in the CryptoAPI MY Store

Certificates in the users local MY certificate store may also be managed through the autoenrollment process. On a per-template basis, autoenrollment can be enabled to delete expired and revoked signature certificates. Encryption certificates and keys are never automatically deleted. However, autoenrollment only manages certificates that correspond to certificate templates defined in Active Directory that contain the certificate template extension. This feature is enabled by setting this policy on the Request Handling tab in the Properties of a given certificate template

 

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MCSE : Security Specialist

Swap file

If you do not have much free hard disk space your swap file will not be able to expand which can cause your computer run slow. Not enough free space also causes your swap file to swap between physical memory and the hard disk more frequently, which increases the chances of general protection faults.

NT boot issues

The boot menu disappears

If you want to set up a dual-boot system, you must install the alternate operating system before you install Windows NT. If you install Windows NT first and then install another operating system, it will overwrite the boot sector, and the PC will no longer look for the NTLDR file. To correct this problem install a new copy of Windows NT to a different directory. Doing so will make NT bootable. You can then edit your BOOT.INI file and remove any references to the new copy.

BOOT: Couldn't find NTLDR Please insert another disk

Your boot sector is okay because it still points to the NTLDR file. However, your NTLDR file is either missing or damaged. To correct this problem, replace the NTLDR file with a backup file or install a new copy of Windows NT to a different directory

Windows NT could not start because the following file is missing or corrupt: \\system32\ntoskrnl.exe Please reinstall a copy of the above file.

This problem usually occurs because the BOOT.INI file points to the wrong location for the Windows NT operating system or NTOSKRNL.EXE is missing or damaged. Copy the file from a backup or install a new copy of Windows NT to a different directory and copy file.

NTDETECT Checking Hardware 'E

The NTDETECT.COM file is missing or damaged. To correct the problem, copy the file from a backup or install a new copy of Windows NT to a different directory

I/O Error accessing boot sector file ulti(0)disk(0)rdisk(0)partition(1):\bootsect.dos

This error indicates that the BOOT.INI file either points to the wrong location for the BOOTSECT.DOS file or that the BOOTSECT.DOS file is corrupt.

OS Loader V4.00 Windows NT could not start because of a computer disk hardware configuration problem. Could not read from the selected boot disk. Check boot path and disk hardware. Please check the Windows NT documentation about hardware disk configuration and your hardware reference manuals for additional information.

This message means that the location BOOT.INI points to doesn't contain a valid file system This error can be caused by an incorrect location specified in BOOT.INI. For example, if the BOOT.INI file points to a volume that's unformatted, you'll receive this error. It can also be caused by a crashed hard disk, or a hardware-implemented RAID device that's dropped off-line.

 

 


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