0967bf21_Lotus_Notes_Traveler_8_5_2__Steps_to_Resolve_Error
[Error Number] 4 [Error Message] The server name does not have a valid form [Notes] This error is returned if the server name, provided by the user, contains invalid characters. [Steps to Resolve Error] 
Check the server name in the Account settings dialog of the Traveler application. Ensure that the server name is properly formed. Try to access that server using some other means.
Lotus Notes Traveler 8.5.2
Steps to Resolve Error