Office 365 with Active Directory Synchronization: Add an Alias to a Mailbox

Originally published at: Office 365 with Active Directory Synchronization: Add an Alias to a Mailbox - RDR-IT

To add an alias to a mailbox in an Office 365 environment whose Active Directory is synchronized, you must use the local directory (On Premise) to add the alias in the proxyaddresses attribute. 1. Open the Active Directory Users and Computers console and verify that the Advanced Features view is enabled 1 . 2. Right-click…