1. A system for automatic folder ownership assignment in an enterprise computer network, the system comprising: actual modification scrutinizing functionality operative for ascertaining which first folders, among a first multiplicity of folders in an enterprise computer network, have been at least actually modified by entities other than IT administration entities, and adding said first folders to a list of base-folder candidates for ownership assignment; first pruning functionality operative for defining a second multiplicity of folders, said second multiplicity of folders being a subset of said first multiplicity of folders which does not include said first folders, all descendents of said first folders and all ancestors of said first folders; actual access scrutinizing functionality operative for ascertaining which second folders among said second multiplicity of folders, have been at least actually accessed by entities other than IT administration entities and adding said second folders to said list of base-folder candidates for ownership assignment; second pruning functionality operative for defining a third multiplicity of folders, said third multiplicity of folders being a subset of said second multiplicity of folders which does not include said second folders, all descendents of said second folders and all ancestors of said second folders; topmost folder scrutinizing functionality operative for ascertaining which third folders among said third multiplicity of folders are topmost folders and adding said third folders to said list of base-folder candidates for ownership assignment; and possible ownership assignment recommendation functionality operative for recommending possible assignment of ownership of at least one of said list of base-folder candidates.