I have circa 200 PST files that I am trying to import to an Exchange 2010 server. I am receiving a lot of "Couldn't connect to the target mailbox" errors both when i create the Import Requests and when I try to resume failed ones. When i was creating the requests I would start getting the error, then wait a few minutes and try again, in which case things would work for a little bit, then i would get the error again. It looks as if there is a limit how many requests i can have so the few first ones run, then the subsequent ones fail. We are not having a CAS Array, this is a single-server installation. Any ideas? I include the exact error below. Thanks!
Couldn't connect to the target mailbox.
+ CategoryInfo : NotSpecified: (60:Int32) [Resume-MailboxImportRequest], RemotePermanentException
+ FullyQualifiedErrorId : 86B989C,Microsoft.Exchange.Management.RecipientTasks.ResumeMailboxImportRequest