MEREP_503 is a standard SAP Table which is used to store Conversation Worklist data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The MEREP_503 table consists of various fields, each holding specific information or linking keys about Conversation Worklist data available in SAP. These include DIRECTION (In/Outbound Indicator (Link to Inbox/Outbox)), MBL_ID (Mobile ID), LASTDTTM (Create Date and Time)... 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. .