Find primary mail address of a Office 365 / Exchange Online mailbox
Find primary mail address of a Office 365 / Exchange Online mailbox Using portal Log on to Office365 portal then navigate to Exchange Admin Center (EAC) or open EAC directly Select Admin tile to view your Admin center page Select Exchange from the Admin drop down. Select mailboxes from the EAC page. search for the user, click on the user to get the mailbox property. Select email address from the list on the left. The address which is highlighted and in caps is the primary mail/SMTP address. We can also use powershell to get the mail address details Open powershell as administrator Connect to Exchange online Run any of the below command Get-Mailbox <"alias" or "displayname"> | select PrimarySmtpAddress Get-Mailbox -Identity <"alias" or "displayname"> | select PrimarySmtpAddress