Hey Friends,I have Exchange 2007 with Server 2008 Ent edition, i am using Windows backup mechanism to take exchange backup. Now for Disaster Recovery, i have installed other Exchange 2007, is successfully installed,But i am able to login new Exchange owa with production users.for example:- My mailbox (Amit) is in Exchange01, but i can login Exchange02 owa with Amit username and password and it is showing me my all mails, even i can send or receive mail as well while login in second exchange owa.?Anybody any guess, what went wrong here?

Hi, If you are talking about mailbox in one mailbox server and login to multiple CAS server then its normal, bcoz in Ex2007/2010 you can login to any CAS and can login to any mailbox hosted in entire exchange organization. Plz correct me if I could not understand you. Regards,Laeeq Qazi|Team Lead(Exchange + Sharepoint + BES + DynamicsCRM) www.HostingController.com

You are right, but i want to reason that how users is able to login on other CAS.Just curios...

You are right, but i want to reason that how users is able to login on other CAS.Just curios... It is all becuase these all server collectively make an exchange organization. Also at least one CAS is required in an Active Directory site hosting exchange servers. So basically when you login to CAS, that CAS queries the AD to know about the mbx server where this mbx exists, and then AD gives the mbx server name to CAS, and then CAS makes a MAPI connection to the mbx server to get mbx data from Mailbox Database. So because of AD this functionality is same for all CAS servers. These all exchange server in an Exchange organization are linked to each other via AD. Regards,Laeeq Qazi|Team Lead(Exchange + Sharepoint + BES + DynamicsCRM) www.HostingController.com