Sbs 2011Migration - Post Migration Issues - Event ID 9217 and PF Mounting Issue

Completed an SBS migration from 2008 to 2011 over the weekend, had a few issues along the way, particularly with uninstalling Exchange 2007 but eventually was completed and the source server demoted.

I have two issues that I need some help with:
Issue 1:
Looking at the application log, getting event id error 9217: MSExchange Transport.
More than one Active Directory object is configured with the recipient address Messages to this recipient will be deferred until the configuration is corrected in Active Directory.

Not sure where to go with this as it's a little beyond me. Have seen some articles about using ADSI but a little cautious about this. Any help would be great.

Issue 2:
This morning people were being prompted for there Outlook passwords and receiving the dreaded Outlook message "Contact the server for information" Had a good look at event logs but couldn't find any issues that stood out. OWA was working fine but several people are unable to use Outlook with it constantly hanging.
I happened to see the Public Folder Database was not mounted with error "Object reference not set to an instance of an object" If you try to mount you receive the following error:
Failed to mount database 'PublicFolderDatabase'.

The database object 'PublicFolderDatabase' in Active Directory has been corrupted and is in an inconsistent state. Unable to find any server hosting a copy of this database.
I did create a new PF database with no issues and changed the main mailbox database to look at this.
I then rebooted. Since the reboot Outlook is now working, but I am a little scared as to why this occurred in the first place.
Not sure if anyone knows?

Thanks for your help
Matthew LoftsMrAsked:
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