Account Lookup is a special web page in Customer's self-care UI that helps to find an Account by its name or other parameters. Page could be found under Customers - My Customers - Account Lookup
The tool can be used to search the whole hierarchy and find an account under sub-Customer as well.
After finding an Account it's possible to navigate to the following pages:
* Login as an Account to open Account's self-care UI
* Authentication Rules of an Account in Customer's self-care UI
* Account Properties in Customer's self-care UI