Hi there

Please see below for a description of how the logic Account reconciliation works:

From Standard ERP version 8.5 2019-11-04 and higher

Nominal Ledger >>Reports>>Account Reconciliation

On the Account Reconciliation report, If a transaction has been reconciled (has a reconciled date) during the period specified in the report specification window, then it will be reflected in the “Reconciled During this Period” section of the Account Recon report, regardless of its transaction date.

For example:
Transaction S/INV.10000001:
    Transaction date: 05.01.2019
    Reconciled Date: 02.03.2019


Scenario 1:
When running the account reconciliation report, the period is set as 01-01-2019:28-02-2019
Transaction S/INV.10000001 reconciliation date does not fall within the period specified. It will therefore appear as unreconciled on the report.

Scenario 2:
When running the account reconciliation report, the period is set as 01-01-2019:31-03-2019
Transaction S/INV.10000001 reconciliation date does fall within the period specified. It will therefore appear as reconciled on the report.