T399A is a standard SAP Table which is used to store Control: Automatic Order Creation data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The T399A table consists of various fields, each holding specific information or linking keys about Control: Automatic Order Creation data available in SAP. These include IWERK (Maintenance Planning Plant), SVOBJ_ID (Service object ID), SVOBJ (Service object), AUART (Order Type)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .