supposed the business partner in R/3 and CRM should have the same number.
Number range Y5 1000000-1999999 EXTERNAL
With this configuration the first BP coming from R/3 gets number 1000000 in CRM. But if i want to create the second BP in CRM with the number 1000001 then the customizing would have to be
Number range Y5 1000000-1999999 INTERNAL
whis is not possible as a number range has to be either internal or external.
Number range Z5 1000000-1999999 INTERNAL
wouldn´t help as number ranges cannot overlap
What could be the solution?