When you create a campaign in CRM 4.0, the Office field(attribute name: objective) has a 2,000 characters limit. How to get rid of the limitation?
It's a system field which you can't change its MaxLength from CRM customisation interface, however, you could make change from the customisation.xml file.
What you need to do is: export the campaign entity as a xml file, open the field, search "objective", you may find it's property:
Although it's an unsupported customisation, since CRM 4.0 does allow you extend the field length(using DMM), so I think it's safe and nearly supported. :)
By the way, this technique can be used in many places, not just for this attribute. It also works in CRM 3.0.