Outlook Error - The name cannot be resolved. The name cannot be matched to a name in the address list.

Outlook Error - The name cannot be resolved. The name cannot be matched to a name in the address list.

Solution:

• Check you can able to access the user mailbox using Outlook Web Access. 
• Verify the user object is getting listed in the Global Address list
• Check whether user is configured Hidden from Exchange address lists
• Open Adsiedit- Go to Domain partion - Select the user object - Right Click on the user and select Properties - check the value of LegacyExchangeDN 
• Also verify the below attribute value which plays vital role in Exchange

homeMDB
homeMTA
legacyExchangeDN
mail
mailNickname
msExchHomeServerName
msExchMailboxGuid
msExchMailboxSecurityDescriptor
proxyAddresses