Clear Outlook Names Cache for 2003 2007
Delete %userprofile%usernameapp datamsoutlookoutlook.nk2
Outlook 2010 enable editing of attachments
Solution: Edit Message Method
If you put the email message into Edit mode you can edit the attachment and save changes back to the original attachment on the email message. You need to remember to save the attachment when closing AND save changes to the email message as the copy in the securetemp folder will be deleted when you close Outlook.
If you add the Edit Message button to the QAT or Ribbon on a message (NOT the main Outlook window), its very easy to get into Edit mode. To add the command to the QAT (or ribbon):
1.Open a message
2.Go to File, Options, then choose Quick Access Toolbar
3.Select All Commands from the Choose command dropdown
4.Click in the list of commands the scroll down to the E