Question:
Where do I find materials or textbooks on SAP APO Security
Answer:
SCM 4.0: https://websmp201.sap-ag.de/~sapidb/011000358700003069412004E.PDF
SCM 4.1: https://websmp201.sap-ag.de/~sapidb/011000358700001172312005E.PDF
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Kind regards,
Lodewijk Borsboom