Please can you explain to whom does this policy apply, it does not have to do with Outlook clients on their laptop or pcs right ? So to whom does it apply ?

This is for phones connecting to Exchange via ActiveSync. This is not for mobile laptop users using Outlook. This is still MAPI/OA connection. Here is a good matrix on ActiveSync policies: http://en.wikipedia.org/wiki/Comparison_of_Exchange_ActiveSync_ClientsTim Harrington - Catapult Systems - http://HowDoUC.blogspot.com

Does it apply if I connect a blackberry to synch with Outlook to synch mails, contacts etc...?

Blackberry does not use ActiveSync, if using a BES server it will utilize MAPI from the BES server to the Mailbox server.Tim Harrington - Catapult Systems - http://HowDoUC.blogspot.com

Please explain or send me a good link to help me understand MAPI and how it works thanks

MAPI is the primary connectivity method for Exchange (along with smtp, pop, imap, etc). Not sure exactly what you are looking for, here are some generic links: http://en.wikipedia.org/wiki/Messaging_Application_Programming_Interface http://searchexchange.techtarget.com/sDefinition/0,,sid43_gci214084,00.html Tim Harrington - Catapult Systems - http://HowDoUC.blogspot.com

so when I compose a message and click send does Outlook send the message to Exchange or it is the other way round and exchange collects it from the Outlook client and delivers it. I would like to have a quick explanation of the path a message takes when using Outlook with Exchange once I press the send button. From what I understood MAPI is a communication software/protocol which allows software to communicate with Exchange ( MAPI Server ) Thank You

Regarding the Active synch policy I just checked and found out that each mobile device connected using active synch will get those policy settings applied. thank you

Here is a book that can help http://www.amazon.com/Microsoft-Exchange-Server-Advanced-Administration/dp/0470038519/ref=sr_1_2?ie=UTF8&s=books&qid=1281813449&sr=8-2 There are many others however. Russ Russell Grover - SBITS.Biz [SBS-MVP] MCP, MCPS, MCNPS, SBSC Remote Small Business Server/Computer Support - www.SBITS.Biz BPOS - Microsoft Online Services - www.BPOSMadeEasy.com Easy Redirect to Microsoft's New SBS Public Forum - www.SBSRepair.com

Only phones that use Active Sync of course. (So you are no confused.) RussRussell Grover - SBITS.Biz [SBS-MVP] MCP, MCPS, MCNPS, SBSC Remote Small Business Server/Computer Support - www.SBITS.Biz BPOS - Microsoft Online Services - www.BPOSMadeEasy.com Easy Redirect to Microsoft's New SBS Public Forum - www.SBSRepair.com

Or this one if exchange 2007 http://www.amazon.com/Microsoft-Exchange-Server-Administrators-Consultant/dp/0735625867/ref=sr_1_2?ie=UTF8&s=books&qid=1281813666&sr=8-2 RussRussell Grover - SBITS.Biz [SBS-MVP] MCP, MCPS, MCNPS, SBSC Remote Small Business Server/Computer Support - www.SBITS.Biz BPOS - Microsoft Online Services - www.BPOSMadeEasy.com Easy Redirect to Microsoft's New SBS Public Forum - www.SBSRepair.com