Exchange 2003 to 2010 migration - mailbox corruption
Posted on 2011-03-21
Started an Exchange migration from 2003 to 2010. When we started to move the mailboxes we found many of them failing to move because of errors. In some cases there are thousands of messages that are showing as corrupted. We can go into the users maibox and see the corrupt items, we can open them and we can even forward them. If we forward a corrupt message, it appears to be intact and accessible. We cannot copy or move the corrupt messages to a new folder. We cannot export them to a .pst file. Exmerge will not handle the corrupt messages. We looked at the databases with Ontrack's Exchange recovery tool and it will not allow us to move the corrupt messages to a .pst file either. We setup a rule to forward the corrupt messages, but this is only partially successful. Some of the messages will forward while others will not. We haven't found a pattern to what will and won't forward. Again, we can open all of the messages and even open attachments in the message. There are so many messages flagged as corrupt, it would not be practical to try and move them manually. The Exchange databases are coming up clean using isinteg. We have done a defrag as well. There are numerous applications out there that claim to perform Exchange recovery, but none that specifically talk about corrupt messages. Has anyone seen anything like this before or has anyone tried any of these utilities with success?