At least two of my clients who have been recently migrated from exchange 2003 have experienced this issue. When sending to a fellow user within the company by using the auto suggestion in outlook results in a mail bounce back. When selecting the same user in the address book also results in the same bounce back message. The current workaround is to manually type the user's email address after manually deleting the auto-suggestion setting. However, the user cannot send using the contacts in the global address book. The weird thing is that the email listed under the properties for the contact in the address book seems correct listing the user's normal email along with the onmicrosoft account. Is there anyway to fix this issue.
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