SPWebApplication.SendLoginCredentialsByEmail property
SharePoint 2013
Gets or sets a value indicating whether a new user's login credentials are sent to them by e-mail when their account is created.
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Property value
Type: System.Booleantrue if send login credentials are sent to new users by e-mail when their account is created; otherwise, false. The default value is true.