exchangembxtype values and meaning

Hi,

I am looking to query the ExchangeMailboxEntry Table in SQL and subsequently make a couple of changes as well.

While we are not using EV Reports in this environment, I need to depend on direct interaction with SQL.

I understand the risks I would be undertaking, but this will be a one time activity. Once I get to install and configure EV Reports or get the desired results from running SQL Queries (Select Statements), I do not have to make direct changes in SQL

Hence I need to know what are the different values for exchangembxtype and their meaning?