Problems enabling mailboxes

This section describes how to diagnose and fix problems with enabling archiving for mailboxes.

Work through the following checks to correct the problem.

Is the Exchange Mailbox Task for the Exchange Server running?

The Exchange Mailbox Task does the work of enabling mailboxes, so the Exchange Mailbox Task must be running to enable mailboxes.
Does the Enterprise Vault mailbox still exist or has it been created incorrectly? A problem here normally means that, when you try to enable a mailbox, you see the error Failed to enable the mailbox.
Is the Enterprise Vault mailbox hidden from the address book?

Use Microsoft Exchange Server Administrator to look at the properties of the Enterprise Vault mailbox. Make sure that, on the Advanced tab, Hide from address book is not selected.
Is the Microsoft Exchange Information Store service running on the Exchange System?
On Microsoft Exchange 2000, is the Mailbox Store mounted?
In order to enable Microsoft Exchange 2000 mailboxes the Vault Service account must have permission to modify a user's extensionData attribute. If the account does not have this permission, you see the error Insufficient Active Directory Permissions. Check and modify the Vault Service account permissions as necessary.

To grant permission to modify the extensionData attribute

Click Start > Programs > Administrative Tools > Active Directory Users and Computers.
Right-click the domain, and then click Properties.
Click the Security tab.
Click Advanced.
Click Add.
Double-click the account to which you want to add the permission. The Permission Entry dialog box appears.
Click the Properties tab.
Next to Apply onto, select User objects.
In the Permissions list, next to Read extensionData, select the Allow checkbox.
In the Permissions list, next to Write extensionData, select the Allow checkbox.
Click OK repeatedly to close the dialog boxes.