This policy setting allows you to specify the number of incremental download attempts of the offline address book (OAB) allowed ...

This policy setting allows you to specify the number of incremental download attempts of the offline address book (OAB) allowed in a 13 hour period.If you enable this policy setting, you may specify the number of incremental download attempts of the offline address book (OAB) allowed in a 13 hour period.  If you set the value to 0, then no incremental download attempts are allowed.  If you set the value to the maximum of 65535, then that will allow an unlimited number of incremental OAB download attempts.If you disable or do not configure this policy setting, an unlimited number of incremental OAB download attempts of the OAB will be allowed.