Event ID - 2028

Event Id2028
SourceMSExchangeIS Public Store
DescriptionThe delivery of a message sent by public folder <folder id> has failed. To: <recipient> Cc: <recipient> The non-delivery report has been deleted.
Event InformationAccording to Microsoft:
This issue can occur if a moderated public folder or another rule that forwards posts to Exchange Server mailboxes sends e-mail messages to specified accounts. If an account is deleted, the rule still attempts to send the message and generates an NDR and the events in the "Symptoms" section of this article.
To resolve this issue, open the properties for the public folder in question from a mailbox that has owner rights. Click the Administration tab, click Moderated Folder, and then verify that any mailboxes in the To box are still valid mailboxes. Click Folder Assistant, and then check any rules that are created for the folder to ensure that all of the accounts that are listed are valid.
Reference LinksXADM: Events 2028 and 290 from Messages Sent by a Public Folder

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