Impact of changing number ranges for FI & MM for MM Invoice documents

Question

Hello Friends,
Client is asking to have both MM invoice document number and FI document number to be same, what will the impact of this change since we have done many transactions already in production.
Kindly suggest the best time and way of doing his.
Thanks in Advance.
Regards
Ravi

Answer 1

We can align both the FI and MM document number ranges in sync
SAP gives you customizing options to make both document numbers the same. The solution lies in the number range assignment of the MM and FI document. You need to configure the MM document number assignment as internal and external for the FI documents. (FI documents are set up with external-assigned numbering, while the MM document has internal, or system-generated, numbering.) In this case, the MM document number is passed on to the FI document, which means that the number of the FI document is identical to the MM document. .
Because the document number assignment in MM is not company code-specific, in contrast to the FI document, you need to take the following points into consideration before using external document number assignments for FI documents. They have the following effects on your system:
u2022     Continuous number assignments for FI documents are not guaranteed, especially if you have more than one company code.
u2022     The document number ranges in MM and FI have to be the same for all company codes.
u2022     In Release 4.6C, you need to use internal number assignments for revaluation documents, invoice reduction documents, Evaluated Receipt Settlement (ERS) postings, or reversal documents. There are no restrictions as of SAP Enterprise 4.70.
u2022     Use a different number range assignment for FI invoice posting (FB60), because FI invoice postings usually use internal number range assignments and the postings originate in FI, not MM.
u2022     If you use document parking and the number range intervals are fiscal year-dependent, you cannot change the posting date of the document if the fiscal year is different to that determined for the previous posting date. In this case you have to delete the document and re-enter it. There are no restrictions for fiscal year-independent number ranges.
please find below the confiuration steps
OMR4 - CREATE NUMBER RANSGES SAY 52 (EXTERNAL)
AND ASSIGN THE NUMBER RANGES TO DOCUMENT TYPE RE.
OMRJ MAINTAIN MM NUMBER RANGES SAY 52 (INTERNAL)
AND ASSIGN THE SAME FOR DOCUMENT TYPE RD.
Regards
P RAMASUBRAMANIAN