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 if a user select an item in their email (Outlook 2003), and then click on the delete icon in Outlook, nothing happens. &nbsp;If you then click on the icon again, a message pops up “unknown error” and the item goes away. &nbsp;If you select a message but use the “delete” key on the keyboard instead of the icon, then item simply deletes. This problem started occurring after their mailboxes were migrated from Exchange 2003 to Exchange 2010. The client RPC encryption is disabled in Exchange 2010, so it’s not that....
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 if a user select an item in their email (Outlook 2003), and then click on the delete icon in Outlook, nothing happens.  If you then click on the icon again, a message pops up “unknown error” and the item goes away.  If you select a message but use the “delete” key on the keyboard instead of the icon, then item simply deletes. This problem started occurring after their mailboxes were migrated from Exchange 2003 to Exchange 2010. The client RPC encryption is disabled in Exchange 2010, so it’s not that....

problems deleting email msg in outlook 2003

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.

Outlook

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.