At this post I added how to reset sysadmin password for HP Universal CMDB to login jmx-console. Please follow these steps to reset sys-admin password for UCMDB 10.x.
Connect UCMDB database server
Create a new query
select * from URM_RESOURCES where TYPE='Auth_USER' and RESOURCE_NAME='sysadmin'
Edit password hash and commit.
You need to check TEXT_DATA column to change password hash for sysadmin and then commit changes on Database. I added a basic hash that you can use for reset password.
Hash Data: 4fjGc6QQqdyu8YmxfsagTWQu9lQ=