Action: Record the full name of your current email server Office 365 needs the name of the source email system, sometimes ...

Action: Record the full name of your current email server Office 365 needs the name of the source email system, sometimes referred to as a server, from which you want to migrate mailboxes. There are many ways to get the name of your email system. The easiest way is by using an email client that's connected to your email system, such as Outlook Web App . You can also contact support for your source email system.