When signing into Mainframe Team-Center and providing my credentials I would like the login to the Vantage mainframe tasks to be trusted so I do not have to specify my password each time (much like signing into a TPX session and not having to specify a password with every lpar I log into). Is it possible?
The way you are asking Web Client to work is somehow available.
The condition to get it working is that the Userid/Password you enter at Web Client (MTC) login to be the same used to connect to each Lpars. In such configuration, you need when login to another Lpar and credentials are asked, to select "Use Global Credentials". The original password will then be used to connect to each Lpars.
The PassTicket is not supported by the Web Client.