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Applies to Product - Dynamics 365 Finance
 
What’s happening?
The customer reported an issue with Dynamics 365 Finance and Operations where entering a quantity of 3.5 automatically changes it to 4.00.
 
Reason:
The underlying cause of this is related to the rounding unit being set to 1, which affects how decimal quantities are registered.
 
Resolution:
To resolve this, change the decimal precision in the Units page (Organization administration> Setup> Units) to 2 so that the registration of quantities with decimal values, such as 3.50, is allowed.
 
More details about Units configuration at Manage units of measure - Supply Chain Management | Dynamics 365 | Microsoft Learn