You can use the Save Document Library Object (SAVDLO) command to save DLOs that have changed since a particular time. When you specify SAVDLO DLO(*CHG), the default setting saves DLOs that changed since you saved all DLOs for that user ASP (SAVDLO DLO(*ALL) FLR(*ANY)). When you save changed DLOs, the server also saves the distribution objects in the QUSRSYS library, which are called unfiled mail.