I'm not aware of any global setting in Notes that controls rounding.

HCL Notes/Domino 8.5 Forum (includes Notes Traveler)

Subject:

BTW, according to the technote you are referring to only LotusScript uses half-even rounding. The problem with @Round is of a different nature, it is related to numeric accuracy. (Apart from that, @Round does use half-up rounding.)

Bottom line: If you wish to control rounding, you basically have two choices:
- In LotusScript and formula language, work around the problem as described in the technote.
- If Java is an option, you could use class java.math.BigDecimal to control rounding behaviour.

Feedback response number JSAK972H2N created by ~Tip Zekjumitexakol on 04/23/2013