With Exchange 5.5, this was
simple because we had a service account. We simply logged in with
the service account or used the credentials to gain access.
This was most helpful when we were restoring a mailbox or otherwise
capturing data in a lab or temporary restore server.
SOAPBOX WARNING: I feel the need
to preach a little here, so skip the next two paragraphs if you
want. I am sure that I do not need to tell you guys how important it
is that we not abuse our power in respect to our access to messaging
servers. When we create super accounts, it makes it that much easier
for someone else to abuse the system. It also makes it fairly easy
for us to accidentally wipe out great amounts of data. I wasn't even
sure if I should post this (or repost actually since most of the
steps are already published in Q262054) because "super" access is
only required in a few remote instances.

The Active Directory and
Exchange 2000 now provide the ability to distribute the
administrative responsibilities among different groups. We can
easily give Exchange Administrators control over some systems and
deny or grant certain folks with Active Directory permissions to
certain Exchange settings. By handing out certain keys to certain
groups of people, we can further protect our system from accidental
or malicious attacks from internal systems personnel. For example,
it is not always appropriate for the Domain Administrators to be
able to manipulate the Exchange stores or systems, and visa-versa.
By default, Exchange Domain
Servers (and Exchange services) is given full permissions of each
mailbox servers in the domain. To see this setting, open the Active
Directory Users and Computers MMC console that Exchange installed
and click View and Advanced Features. Next, navigate to an Exchange
user in the domain and select the Exchange Advanced tab on the
users' properties window. Now select Mailbox Rights. While you are
here, select the Domain Admins and Enterprise Admins and notice that
they have both been given Deny access to Full Mailbox access. what
this means is that if you are a member of both the Exchange Domain
Servers and one of the Admin groups, you will not have access to the
other mailboxes. If you are not a member the Enterprise or Domain
admin groups and are in the Exchange Domain Servers group, then you
will have access.
Be patient when you add someone
to this group. In my lab, the account did not have immediate access.
Remember that the domain controllers have to replicate changes. In
my case, I rebooted the Exchange server which is also the DC and
Global Catalog Server. Only after that reboot was the select account
able to open all mailboxes in the domain.
For additional information, see the Microsoft
support article at:
http://support.microsoft.com/support/kb/articles/Q262/0/54.ASP