Hello When I try to run the command get-mailboxdatabase i get the following error [PS] C:\Windows\system32>get-mailboxdatabase WARNING: An unexpected error has occurred and a Watson dump is being generated: Value cannot be null. Parameter name: key Value cannot be null. Parameter name: key + CategoryInfo : NotSpecified: (:) [Get-MailboxDatabase], ArgumentNullException + FullyQualifiedErrorId : System.ArgumentNullException,Microsoft.Exchange.Management.SystemConfigurationTasks.GetM ailboxDatabase this is my only exchange server but i can still add new mailboxes to the 'default' mailbox. Could someone please offer some assistance to rectify this problem? Kind Regards

Hi, Is it only one default mailbox which get create when do the installation ?. What about if you create new databse thru EMC and then check in EMS ? What about if you use Grt-Mailboxdatabse -server "Serve Name" Anil MCC 2011,ITIL V3,MCSA 2003,MCTS 2010, My Blog : http://messagingschool.wordpress.com

Hello Anil, My apologies for the late reply. When I specify the server (as you mentioned) the database is shown. However without that I still get a 'Value Cannot be Null' message. Yes, this is the default database created during installation, and was populated via a mailbox move from my old exchange 2007 server. Kind Regards

What version of Ex and SP? Make sure you're on the latest SP and rollup you could be experiencing a known issue. FIX: ArgumetNullException exception error message when a .NET Framework 2.0 SP2-based application tries to process a response with zero-length content to an asynchronous ASP.NET Web service request: "Value cannot be null" http://support.microsoft.com/?kbid=973136 http://msexchangeteam.com/archive/2010/09/01/456094.aspxJames Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Hello, I am running version: 14.00.0639.021. I am going to make a copy of this server and apply the updates (to protect against any problems to my primary server). Thank you for your advice, I will let you know the results.

Hi, How is the issue now? XiuPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hello All, Apologies for the lack of replies. I have upgraded to SP1 and the problems I had before do seem to have disapeared. Thanks to All!