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42Hi Microsoft Experts,
I’m experiencing a strange behavior with currency conversion in Business Central Cloud v27.0 when posting General Journal lines that use a manually entered exchange rate.
① Manual rate ignored after posting
When I open General Journal and click Change Exchange Rate, I manually adjust the Exchange Rate / Currency Factor before posting the document.
However, after posting:
- The system still reads the rate from Currency Exchange Rate (Table 330) instead of using my manual value.
- In G/L Entries (Table 17), the Source Currency Amount differs from the amount that should have been calculated with the manual rate.
- Meanwhile, the Amount (LCY) appears correct, suggesting the rate is reapplied from standard setup, not from the journal line.
② Using a modified rate in Table 330 produces a small calculation drift
To double‑check, I even entered the same rate manually inside Currency Exchange Rate (Table 330) before posting.
While the system then accepts the rate from the table, the calculated LCY and source amounts still show a minor discrepancy — as if Business Central recalculates the amount again during posting using a rounded factor, not the exact journal or table rate.
Summary
- Environment: BC Cloud v27.1 (Production)
- Expected behavior: When the user adjusts a manual exchange rate on the General Journal, posting should preserve that factor and apply it exactly.
- Current result: Rate is disregarded or recalculated using table values, causing a mismatch between Source Currency Amount and input Amount.
Could you confirm if this is a known issue in v27.1 or if a fix is planned for the upcoming cumulative update (e.g. 27.2)?
Thank you in advance for your investigation.
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