From: sonyalee9 on
I recently removed an Exchange 2003 cluster from my environment after
a new one was added and all mailboxes/roles, etc were moved to the new
server. Since I removed the old one, whenever I right-click a mailbox
store on the new server in question and select properties, I get the
following error:

Exchange System Manager

There is no such object on the server.
Facility: Win32
ID no: c0072030
Exchange System Manager

I am able to click OK and get into the properties and make changes as
necessary so I'm not sure where this error is coming from. I don't
see anything related to it in the event logs. I have tried it on my
desktop pc as well as on the server itself. I have also tried it
using a different account that has full privileges (as does mine, no
permission changes have been made). I do not get this error on the
mailbox stores of other servers. I also don't get this error when I
access the properties of the server or storage group objects, just the
mailbox stores. This also happens with newly created mailbox stores
on this server. Any info you may have is welcome!