At least what you should know about DAG

1. Its a combination of SCR & CCR
2. Its Limited dependancy with WindowsFailoverCluster. DAG uses Windows Failover cluster,heartbeat,& filesharewitness etc.but we neeed not to mangae it from Failover cluster console & its not a full fledged Failover cluster.
3. Active manager ( Primary Active mgrs,Standby Active mgrs) component which runs in each mailbox svr takes care about failover/switch over instead of Exchange cluster resource DLL ( clusres.dll)
4. CCR cannot cooexist with any other Role,Whereas DAG node can cooexist with any other exch role.
5. We need not to deploy DAG intially itself,we can create & add DAG nodes at any point in time.thus its scalable too.

SCHEMA VERSIONS -Operating System & MS Exchange

How do you find Schema Versions -Use dsquery or ADSIEDIT

13 - Windows 2000 Server

30 - Windows Server 2003 RTM, Windows 2003 With Service Pack 1, Windows 2003 With Service Pack 2

Exchange 2010 Features

1. DAG ( Database Availability Group)

2. Outlook WebApp almost like MS Outlook

3. Conversation view,Able to attch mails from OWA itself.

4. Mail Tips

5. No storage groups

How to export SMTP Relay IPs ?

export SMTP relay IPs

(Get-ReceiveConnector "MyConnector").RemoteIPRanges > C: \RemoteIPRanges.txt

Bounce back for Attachment mails

After installing Edge Role in 2007 SP2,

Do add a entry “ in edgetransportexe.config & restart transport service.

Else you may face bounse for attachment mails.