click F4 on ID Type field, in value help window there are several entries:
we need to find the customizing in the backend where we could maintain more entries for the value list.
Approach1 click F2 on the field to figure out the technical information:
we know the value help is implemented in GET_V method, so double click on it:
The value help is implemented via callback class CL_CRM_UIU_BP_IDTYPE_1_F4:
Open the class method, we find the persistent table to store identification id information:
use where used list on the table, then we found the maintenance view:
Approach2 we can directly use the search function in SPRO by clicking search button with search keyword “identification”:
There are lots of results however we could only check those in area “SAP Business Partner”. It is quite easy to find the correct one in this case:
Mark the search result, the target customizing activity will be automatically located.