I have a question, since Exchange 2010 is using OPATH now for filtering users... what about LDAP?I have a spam filter for email that queries off the 2003 AD DC for valid email addresses... But Exchange 2010 uses OPATH, how is this gonna work?Does AD still uses LDAP to the Exchange Server or OPATH? If it is OPATH then how will any devices that need to use LDAP work anymore? :)

On Thu, 15 Apr 2010 22:17:42 +0000, Sport1 wrote:>>>I have a question, since Exchange 2010 is using OPATH now for filtering users... what about LDAP?>>I have a spam filter for email that queries off the 2003 AD DC for valid email addresses... But Exchange 2010 uses OPATH, how is this gonna work?The AD hasn't changed. And OPATH is just translated into LDAP queries.>Does AD still uses LDAP to the Exchange Server or OPATH? It's the Exchange server that uses LDAP to the AD, not the other wayaround. And OPATH is just to make queries easier to understand (or sosome people think).>If it is OPATH then how will any devices that need to use LDAP work anymore? :)The same way they always have.---Rich MatheisenMCSE+I, Exchange MVP--- Rich Matheisen MCSE+I, Exchange MVP

Thanks Rich.So as I understand it,1. AD still uses LDAP for queries of users and such....2. Exchange 2010 uses OPATH internally in itself but when it needs to interact with AD it uses LDAP to the AD DC.3. And exactly do you mean by OPATH making it easier to understand? For the Server or User?

On Fri, 16 Apr 2010 15:46:33 +0000, Sport1 wrote:>>>Thanks Rich.>>So as I understand it,>>1. AD still uses LDAP for queries of users and such....Correct.>2. Exchange 2010 uses OPATH internally in itself but when it needs to interact with AD it uses LDAP to the AD DC.OPATH is a small, domain-specifc, "little language". It's not aprotocol like SMTP, LDAP, POP3, IMPA4, RPC, HTTP, etc. Just as you canwrite a program in many different languages, when that program has to"talk" to something it uses the protocol defined by that object.>3. And exactly do you mean by OPATH making it easier to understand? For the Server or User?For the user. When I began programming (on machines that didn't haveto use wiring panels) it was done in "machine code" and on punchcards. The machine just read the data on the card, loaded the datainto memory, and began executing the data (which was the program).Easy for the machine, hard for the programmer. Things progressed toSPS1, SPS2, AutoCoder, Fortran, RPG, Cobol, PL/1, etc., making thingseasier for the programmer. But to get the machine to understand it ouneeded a compiler. OPATH is just a way to express the logic, but theactual work is done with LDAP.---Rich MatheisenMCSE+I, Exchange MVP--- Rich Matheisen MCSE+I, Exchange MVP