This is performed when you have the log files. However, in the event of failure, use hard EDB recovery methodology thru Eseutil / p command. Chk files from the folder Start the service and see whether the databases are free from corruption now. Whereas, in case when the data store is running, use Exmerge to export the mailboxes in PST file format However, at any stage you are feeling like the mailboxes cant be removed or you fear to lose the info with the Eseutil application, 3rd party applications, intended for Exchange Server recovery are here at your assistance.
These will extract your mailboxes from the corrupted EDB file and will enable EDB repair .