I inherited a network where the Domain controllers where recently upgraded from 2003 to 2008R2. After the upgrade the DHCP MMC don't show the leases in several of the scopes, only showing a message of "There are no items to show in this view." All the scopes with the problem have reservations in them. Otherwise they are practically identical. If i use the MMC from a 2003 server i can see the leases and work with them without problem. From a Windows 7 machine i have the same problem.
How can i solve this problem? I could not find a solution in google, only some mentions of it and several "i also have this problem" but no solutions. Is it caused by the reservations? Should I record, erase and recreate them? Or this would not fix this? Has 2008R2 problems with reservations in DHCP? or the cause is totally diferent.
Aditional Information from the comments: The server is the Enterprise Edition of Windows Server 2008R2, and does not have the Hyper-V role. There aren't superscopes in this server, we have several VLans with DHCP Helper in the Core Switch. I don't know how the migrations was done, I fear that the migration procedure linked by Ricardo Polo wasn't followed, just any kind of automatic migration there is.