In ERP, I have created one material with division = 01:
In CRM, activate division handling in this customizing:
And also create one customizing entry for Division 01 in CRM:
Now download material into CRM, you could observe the division 01 is downloaded and stored in CRM table:
And it could also be found in WebUI:
By default since this field is downloaded from ERP, it could not be changed in CRM.
You could create a new entry for settype COMM_PR_MAT in this customizing:
After that it could be changed in WebUI: