CVE-2021-42291 addresses a security bypass vulnerability that allows certain users to set arbitrary values on security-sensitive attributes of specific objects stored in Active Directory (AD) or Lightweight Directory Service (LDS).

If you try to manually start the service from Services Management Console (services.msc), the attempt may fail with the following error message: Windows could not start the Active Directory Certificate Services service on Local Computer.

With Windows 2000 or Windows XP, you can also reset the machine account from within the graphical user interface (GUI). In the Active Directory Users and Computers MMC (DSA), you can right-click the computer object in the Computers or appropriate container and then click Reset Account. This resets the machine account.

How to use SMTP matching to match an on-premises user to a cloud identity. To use SMTP matching to match an on-premises user to an Office 365 user account for directory synchronization, follow these steps: Obtain the primary SMTP address of the target Office 365 user account.

This behavior occurs because of a timing issue that exists between the Microsoft Exchange Active Directory Topology Service (MSExchangeADTopology) and the WMI Performance Adapter (wmiApSrv) service on Windows Server 2012 R2.

Introduction. Find answers to frequently asked questions about the changes to Lightweight Directory Access Protocol (LDAP). To learn more, go to ADV190023. Contents. What resources should I read to prepare to successfully deploy LDAP Channel Binding and LDAP signing? What issues do you foresee with enforcing LDAP signing?

The Active Directory directory service will not support this configuration of the Kerberos protocol because of the security issue. Configuring the SPNs in this manner causes Kerberos authentication to fail. A possible workaround for this issue would be to use protocol transitioning.

Symptoms. When you try to create a new object in Active Directory, you may receive the following error message: Windows cannot create the object because the Directory Service was unable to allocate a relative identifier. When this problem occurs, the following event may be logged in the NT Directory Service (NTDS) event log:

Resolution. To address this issue, use the ADSI Edit tool to determine the distinguished name of the appropriate mailbox database, and then set the System Attendant homeMDB attribute accordingly.

Now, however, Microsoft 365 Groups in Outlook offer a more powerful solution for collaboration. Tip: If you're looking for information on using Outlook contact groups to send email to a list of people - such as a group of friends - see Create a contact group or distribution list in Outlook for PC.