Please kindly explain what will happen if we lost connection between two sites and using DAG replication on MS Exchange 2010 for couple of days but SME still running for backup everyday? Will I lost log files or checkpoint files for reseeding or re-connecting the replication?
During the SME backup the process of log truncation is handled by Exchange. In the case where DAG replication is not working properly and logs are not being copied and played into passive database copies Exhcange will not truncate the log file until it has been played into all the necessary passive copies.