My user account TestDomainAdmin is a member of Domain Admins. I changed my password recently, and then it's often locked out automatically. After I unlock it with another domain admin account, TheTestDomainAdmin will get locked again in a couple of minutes. I checked the logs in the Windows Event Viewer. It shows many logs like the following. It looks likeTestDomainAdmin always gets locked on the Domain Controller itself (TESTDC01), not on the member servers or workstations. I check many places on TESTDC01 but I haven't found any suspect. For example, no tasks with TestDomainAdmin as credential in Task Scheduler, no mapped network drive, empty remembered credentials in Credential Manager, no services usingTestDomainAdmin as credential, etc.
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A user account was locked out.
Subject:
Security ID: SYSTEM
Account Name: TESTDC01$
Account Domain: TESTDOMAIN
Logon ID: 0x3e7
Account That Was Locked Out:
Security ID: TESTDOMAIN\TestDomainAdmin
Account Name: TestDomainAdmin
Additional Information:
Caller Computer Name: TESTDC01