When the UI executes a batch command, currently the server will only log the result of the batch command, not the results of each individual command in it. So any failure in the individual commands will not be recorded.

For example, both operations in the following batch failed. The HTTP error log will contain the following line (formatted for easy reading):

[Tue Aug 09 12:58:55 2011] [error] ipa: INFO: admin@IDM.LAB.BOS.REDHAT.COM:
batch((
    {
        'params': [[u'server1.example.com'], {'updatedns': True}],
        'method': u'host_del'
    },
    {
        'params': [[u'server2.example.com'], {'updatedns': True}],
        'method': u'host_del'
    }
)): SUCCESS