Hi,
Thanks for your question. When a connection has been made to a server through this box, its name will be kept in this area. These names can also populate in the drop down based on the domain the server is in. Unfortunately, these servernames cannot be cleared out easily through the User Interface.
Please run through the following technote to resolve your issue:
http://support.veritas.com/docs/230872
We hope this information helps, if you have any other questions please respond to the post and we will be more than happy to assist you further.