a first database that stores a plurality of user collections, wherein each user collection is accessible by a user of the system and includes one or more first contact files, each different first contact file within a particular user collection including contact data that is unique to that first contact file;

a second database that stores a firm collection, wherein each firm collection is accessible by an administrator of the system, the firm collection including a second contact file for each different first contact file included in the plurality of user collections, each second contact file having at least a portion of data in common with one of the first contact files; and

an administration routine stored in a memory and adapted to be executed on a processor to detect a change made to the common data of one of the first contact files within one or more of the plurality of user collections, to generate an event action in response to detecting the change, and to send a message including the event action to the administrator of the system, wherein the changed common data includes contact data pertaining to one or more contacts other than the user with access to the changed user collection;

a change management routine stored in the memory and adapted to be executed on the processor to receive a response to the event action from the administrator, and to process the response by