During your sync operation, you receive an error in SAP B1 showing  “XXX” Posting Date deviates from the defined range. To complete the operation, define the posting period to match the entered Posting Date.

Cause

• SAPB1 posting data period should be configured properly (for the time period you want to post).

Resolution

To resolve this issue, do the following:

Posting data period implementation in SAP B1 .

To do the same

Go to Administration->System Initialization->Posting Periods just select appropriate period and change the period status to unlocked.