Dear Customer,
Thank you for your post.
Based on my research, In a Microsoft Windows domain, starting with Windows 2000, a discrete communication channel helps provide a more secure communication path between the domain
controller and the member servers or workstations. This channel is known as a secure channel. When you join a computer to a domain, a computer account is created, and a password is shared between the computer and the domain. By default, this password is changed
every 30 days. The secure channel's password is stored together with the computer account on the primary domain controller (PDC). The password is replicated to all replica domain controllers.
Event ID 5722 is logged on your Windows Server-based domain controller
http://support.microsoft.com/kb/810977/en-us
Hope the above information helps.

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