To search, choose whether you want to locate the employee by full name, last name, or e-mail address, then enter all or part of the employee's name or address. Select the 'Match by' option - Substring will search for part of a name, Approximate will help you find names without exact spelling.
Do not use wildcards in the search string.
Link to X500 for Agency wide Searches and X.500 for other NASA Centers
