There are multiple error messages that can be seen. They usually refer to Access Denied or Account is locked
Veritas Data Insight Administrator's Guide - Handling Changes in Account Password
The most common cause is that the password has not been updated in the Saved Credentials section of Data Insight.
Data Insight will attempt to access the resources using these credentials. After a password change in Active Directory, if the Saved Credentials section is not updated with the new password, it will attempt to login using the old password and can cause the account to become locked out after a few tries, depending on the account lockout policy.
When there is a service account password change in AD which is also used by DI, it is imperative that the corresponding saved Credential in Data Insight is updated at the same time.
To achieve this, go to Data Insight Console - Settings - Inventory - Saved Credentials
Select the Edit button for the appropriate account and update the password, followed by the Save button.