We have an account set up on our exchange server that logs all inbound and outbound emails...We then have the mailbox setup to deliver messages to a .pst file...Every two weeks, we have to create 2nd inbox under the original inbox because the inbox fills up and the mailbox will no longer deliver to the .pst inbox...This usually happens around 16000 emails. Is this a limitation in 5.5? Haven't found any info on .pst inbox size...