Fix the OSD Problem After Reinstalling Outlook 2007
When you try to access Microsoft Office Outlook 2007 after reinstalling the 2007 Microsoft Office system, you will receive an error message recommending that you access your Microsoft Exchange server to reinstate the Open Software Description (OSD) file. This can be fixed.
1. In Control Panel, click User Accounts, double-click Mail, and then click E-mail Accounts.
2. Double-click your account, and then change your user name to an alias.
3. Click Next, and then exit.