We are running SharePoint 2013 and are trying to use the people search to find employees by their employee ID number. The column has been indexed in SharePoint and if we search using the syntax column:123456 the search finds the employee.
Any search that does not use the syntax that explicitly say to use the employee id column to search does not find the employee; for example just searching for 123456 would return no users.
Is there something about all numeric searches that SharePoint is ignoring?