What would be the implications of having a user defined field in the KeyLAB AGS mapping.
If you are exporting data out to a client which doesn't have the same mapping it will give an error or make the file not import at all. There is also no way to have client specific mappings. This will mean that tany test which uses the mapping will have the extra fields and the problems it can cause.
For internal use it can be helpful but its important to understand the limitations.
If you need help with AGS in KeyLAB please contact support.