Hi, Recently we upgraded our Domain Controller from Windows 2000 to Win 2003.All went well, but the problem we are facing is we cant perform any exchange tasks from our DC's Active Directory Users and Computers.We are using a Exchange 2000 server. To resolve this i installed the Exchange 2003 System Manager on the DC and i get the exchange tasks, but i am unable to create a mailbox for the Users.When i try to create a mailbox for the user then the mailbox store is empty.

Did you send any mail to new user? Mailbox won't be created on store unless new user send/receive at least a mail.Amit Tank | MVP Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com

Hi Amit, Cant create a mailbox at all.The mailbox store field is empty. when i create a user from ADUC, i can reach till the Create mailbox page, alias=username server=theone/office/mailserver mailbox store= and thus i am stuck here and cant proceed forward. Regards, Rajanu Thomas

There are known issues with upgrading DCs without first uninstalling administrative tools. Can you completley remove all admin packs and exchange management tools, reboot and put them back?Also, can you add mailboxes from other computers with the tools installed - such as the exchange servers themselves? Mike Crowley A+, Network+, Security+, MCT, MCSE, MCTS, MCITP: Enterprise Administrator / Messaging Administrator Do you still have Exchange 2000? Looking to upgrade to Exchange 2010? Read how.

Hi Mike, we were having a win 2000 AD, we added another win 2k3 DC after extendening the schema and running the inetpersonorg fix. Now our Schema is in win2k3 mode. From the old DC i can add mailboxes.But from the new Win 2k3 DC i cannot see the Information Store.That field does not get populated.But can perform all other exchange operations like deleting a mailbox etc...

Per my knowledge, there are three options for such situation: a. Use exchange 2003s ESM, however, this would require running Exchange 2003 forestprep b. Use another 2000 workstation to administer the mailboxes c. Use the ADUC which is installed on the Exchange 2000 server