1. A method, comprising: establishing a sharing relationship between a first endpoint and a second endpoint; identifying a conflict between the first endpoint and the second endpoint, the identifying comprising: determining a first change to a first instance of an item by the first endpoint; and determining a second change to a second instance of the item by the second endpoint before the second endpoint received an indication of the first change; and notifying at least one of the first endpoint or the second endpoint of the conflict via an email message comprising an indication of at least one of the first change or the second change.