After changing the password for the Application Identity (AppID), the Altiris account keeps locking up constantly without a specific reason. There is no specific errors in the Event logs and Notification Server logs that points to the specific application or process that is causing it.
There are multiple reasons for such problem. Some of the most common are:
1. There are some Scheduled Tasks and Active Directory Imports that may be using the AppID as user but having the old password still associated to them.
2. There are services outside the SMP where the customer is using the same AppID account, such as the SQL service account and still the account is not updated
KB TECH44284 "AeXConfig.exe /svcid command does not set application id or service credentials"
Note: Most cases you should be using "Use Application Credentials" to facilitate the change of the Altiris account password.
Symantec Management Platform 7.1 SP1 and later
Symantec Management Platform 7.5 and later