anonymous
2014-06-25 17:06:53 UTC
1) System administrator makes a decision early on to limit mailbox size to reduce the management and hardware costs on the system. Users are encouraged to keep their server mailboxes small. If they exceed their allocation they cannot send mail until they archive or delete enough messages so that they are under their limit.
2) Users bump up against the limit. They try to get more space. If the sysadmin sticks to the policy, they are encouraged to archive their emails off the server mailbox to a personal store file on their hard drive. Users archive inbox and sent mail messages to the PST file when their mailboxes are full.
3) Workstation hard drives are usually not backed up in most enterprises. When they crash the contents of the PST file can be lost.
http://technet.microsoft.com/en-us/library/dd979795(v=exchg.141).aspx