T-code: S_alr_87003642
Two roots can fine the setting
1:Front desk: Accounting-FA- G/L-Environment-Current setting-open and close posting period
2:Background: spro-FA-FA global settings-docu-posting period-open and close postiong period
D999 +/A/D/K/M/S 1-12 , 13-16
+:valid for all accounts type
A:Assets
D:Customers
K:Vendors
M:materials
S:G/L accounts