Very little that isn't in published journals or in academic texts. I would suggest those as your first point of reference. I presume you have waded through the help files on the specifics of Moran's and more general topics as discussed here.
Modeling spatial relationships—Help | ArcGIS for Desktop
Or perhaps a keyword search over on Cross Validated - Cross Validated
In short, outliers is identified as a problem and a large number of papers/discussions address this issue. Specifics on your part may help.
