A new client side feature which Microsoft has released in Exchange 2010 SP1 is the ability of Outlook 2010 to automatically map all mailboxes to which the logged in user has full access. There by, on each mailbox that you have been granted Full Access, you will see it on your own personal mailbox. In Order to disable automatic mapping: Go to this user mailbox, right click on it and choose manage full mailbox access, then just remove your user from the full mailbox access page You can use Read more

  You may face this error while user is sending email from outside the company  to distribution group in your Exchange 2010 organization. You can’t send it either from internet internal mail relay or SMTP server When review logs you see "550 5.1.1 User unknown" error . it works fine with no issues If you use Outlook or OWA Why: When you create new Distribution group In Exchange 2010 an Require that all senders are authenticated has been marked by default.So unauthenticated Read more

  While performing maintenance to Exchange 2010 DAG server you should first remove the DAG member from DAG group.Other wise you may have unwanted DB failovers and many other unexpected issue that may affect company mail services availability Shutting Down DAG Members The Exchange 2010 high availability solution is integrated with the Windows shutdown process. If an administrator or application initiates a shutdown of a Windows server in a DAG that has a mounted database that's replicated Read more

In Exchange 2010 ,while you try to schedule a recursive meeting you may receive the following error “Your meeting request was declined” It didn't specify an end date. The end date must be before xx/xx/xx After implementation of Exchange 2010 ,room mailboxes got automatic setting setting that rejects recursive meetings beyond defined booking window. To resolve the issue you can: Increase booking window period Remove checkbox from “Reject repeating meetings that have an end date Read more

  Microsoft Released set of new videos explaining HA and Unified Messaging features in Exchange 2010. Videos are available online under the following links High Availability and Storage in Exchange Server 2010 (17 minutes) Unified Messaging in Exchange Server 2010 (18 minutes) Read more