I have done the Cell Manager migration between the same OS platform (windows 2008). It should be successful.
Now I can find the old IDB information in the new CM, like Backup Specifications, Device Info and so on.
But some backup specifications can not open with error message "Integration Agent could not read configuration file". I can find and open the configuration files in the folder.
Please give some advices, thank you very much.
The issue has been resolved. And the reason is between DNS and hosts file.