Deleting cached address from NK2 doesn’t fix NDR
========= QUESTION ---------We migrated our Exchange server to anySiteHosting.com's hosted Exchange service, and now when send new emails we get NDR 5.1.1 errors even after deleting the NK2 file or cached email addresses. ========= ANSWER ---------This issue occurs because the value for the LegacyExchangeDN attribute changed. The auto-complete cache in Microsoft Outlook and in [...]