H I have a excel file like that; displayname legacyexchangedn Joe Black /o=OU/ou=Exchange Administrative Group(FY3BO5312PDLT )/cn=Recipients/cn=joeblack233445 I want to use this excel records and adding exchange users x500 email address as legacyexchange dn. When i run the powershell script it will find user Joe Black with displayname and add legacyexchangedn value as x500 secondar mail address. Thanks

Try something like this, sorry, i don't have a machine to test on right now as I"m in the middle of moving, but it should work. If someone has a better way I'd love to know! -Alex $csv = import-csv file.csv foreach ($entry in $csv) { $mbx = get-mailbox –identity $entry.displayName $mbx.emailaddresses += (“X500:$entry.legacyExchangeDN”) Set-mailbox –identity $entry.displayName –emailaddresses mbx.emailaddresses }