You can define a resource name formula under Resource Mapping tab. This formula determines the name format the Integration Manager will use to match resources and their corresponding users. You can create a custom name formula, or retain the default ($FirstName $LastName). The format options are:

Allowed Formula Tag… Web TimeSheet field mapped to…
$FirstName First Name
$LastName Last Name
$LoginName Login Name
$Other Does not map

 

At minimum, the formula must include either $LoginName or both $FirstName and $LastName.