Retrieve Responsible ID via Web Services

[Warlib]

Dear colleagues,

I need to get all tickets where responsible is specific person. There is Web Service method http://otrs.github.io/doc/api/otrs/stab ... ch.pm.html where we can specify ResponsibleIDs. But, unfortunately I can't find way how to get Responsible ID via Web Service or even via Administration panel. E.g. in administration panel you can see agent e-mail and some other information, but there is no ID of an agent. If I use e-mail instead of ID number - I just get null TicketSearch response.

Please, help.

[Warlib]

Is it possible to get access via Web Service to System:Ticket methods: https://otrs.github.io/doc/api/otrs/3.2 ... et.pm.html?

[Warlib]

I found workaround how to get user (responsible) list with user ID. Here is c# code example: http://www.bizkit.ru/2015/03/16/2642/