1-exchange server log shipping , log reply , replication , compare between Exchange 2007 and 2010 2-I\O exchange ratio 3-DAG and active manager 4-hows e-mail works store in RAM then HDD ...etc 5-ports numbers 6-EDGE role 7-Mail box DB recovery 8-error number 1018 I thing IF DB corrupted 9-DAC mode in DAG between sites 10-log file size ...etc 11-requirement to deploy exchange server 2010 HW and to consider the I/O ratio and so many Question that I can't remember ,but most of them tough and deep :)