As reported by James Lentini on the ML, Integer Value Editor does not accept negative numbers.
This is a question about Apache Directory Studio.
The Integer Editor, the default editor for attributes using the
Integer syntax (188.8.131.52.4.1.14184.108.40.206.27), doesn't allow negative
numbers. Section 3.3.16 of RFC 4517 indicates that the Integer syntax
allows negative numbers. Is this a know issue with the Integer Editor?
As a workaround, I've found that selecting "Edit Value With" and using
the "In-Place Text Editor" allows negative numbers to be entered.