Somehow after finding the logs, I figured out that we need UserCustomerID instead of ID. Logs are : [Sat Feb 23 17:41:50 2013][Error][Kernel::System::CustomerUser::DB::CustomerUserUpdate][686] Need UserCustomerID! . Thanks, Jignesh From: dev-bounces@otrs.org [mailto:dev-bounces@otrs.org] On Behalf Of Jignesh Kakka (jkakka) Sent: Saturday, February 23, 2013 3:58 PM To: dev@otrs.org Subject: [dev] Problems in Customer Update I am using following syntax as mentioned in dev.otrs.org to update Customer $CustomerUserObject->CustomerUserUpdate( Source => 'CustomerUser', # CustomerUser source config ID => 'mh' # current user login UserLogin => 'mhuber', # new user login UserFirstname => 'Huber', UserLastname => 'Manfred', UserPassword => 'some-pass', # not required UserEmail => 'email@example.com', ValidID => 1, UserID => 123, ); Unfortunately, I am not able to update customer. I would like to know the values that I should enter in these fields ID, and UserID Thanks, Jignesh