Office 365, change the default email address on a Shared Mailbox
Ran into this problem after I created a shared mailbox, without specifying which email address I wanted to be the primary one. Original source here: http://www.bpossibility.com/2011/08/10/office-365-shared-mailbox-how-to-change-the-default-email-address/
“Office 365 brings Shared Mailboxes that allow users interact with a common Inbox and Calendar. The following site describes how these are made, licensing and other ins-and-outs such as setting Litigation Hold and delegating control to users:
http://help.outlook.com/en-us/140/ee441202.aspx
Although following these steps will probably create the wrong primary SMTP address.
Other situations, such as multiple domains in the one Office 365 tenant, will more than likely raise the need for several Shared Mailboxes in different domains.
When creating the Shared Mailbox specify the -PrimarySmtpAddress, below is an example:
New-Mailbox -Name “Shared Mailbox” -Alias sharedmbx -Shared -PrimarySmtpAddress SharedMbx@DOMAIN.COM
“