After changing the UISysadmin password using resetPassword (or any other method) you must do the following in 10.x version:
i. In the JMX Console, locate the UCMDB-UI:name=UCMDB Integration service
ii. Run setCMDBSuperIntegrationUser with the user name and new password of the integration user
If you are using the UCMDB Browser:
i. Change the UCMDB Integration User Credentials
The UCMDB Browser connects to the UCMDB server through the API using the UCMDB UI integration user credentials. If one changed the UCMDB integration user credentials from the initial default settings, perform the following steps:
1. Create a credentials.txt tile and put it in the same directory as the ucmdb_browser_config.xml file.
2. In the file credentials.txt, enter the following content:
Where user-name is the integration user's user name and user-password is the integration user's password.
3. Restart the Tomcat server.
Caution: For multiple UCMDB configurations (as described in "Configure Multiple UCMDB Servers" on page 27, the same integration user should be defined on all UCMDB servers.
Note: After restarting the Tomcat server and then logging in to the UCMDB Browser, a new encrypted file credentials.bin is created and the file credentials.txt is removed
Both of these are documented in the Administration Guide and the Browser Install and Configuration Guide.