Before we get started, we should point out that we have not tested this in practice. We are only basing this on public information (primarily from this article). Yet, it sounds reasonable, and feel free comment below and correct us.
Similar to both Dovecot and Microsoft Exchange, Mirapoint Message Server also support logging into users’ accounts via the admin account by using a modified username-string.
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If you’re thinking of moving into or out of Microsoft’s Office 365, you’re in luck. YippieMove can now help you migrate email data both in and out.
Unfortunately the workflow isn’t as streamlined as we’d like it to be due to the fact that the server-address differs between each instance. Regardless if you are moving to or from Office 365, you need to locate the address to the IMAP-server. To get this data, log into Outlook Web App (OWA) and go to “Options” in the upper right-hand corner, and then click on “Settings for POP, IMAP, and SMTP access…“.
This should bring up a new window with the information. The address should look something like xyz.outlook.com.
Once you’ve have this piece of information, you can now use YippieMove. In Step 1 (or 2), provide YippieMove with your full email-address as the username, your password. Select the option ‘Other’ and enter the address you found above in the ‘Host’ field, and check the SSL-checkbox (which should change the port to 993).
If you’re performing a batch-migration, simply use the same settings as mentioned above for src/dst_host, src/dst_host, src/dst_port, src/dst_ssl in the CSV-file.
Unfortunately, there seem to be no way to authenticate to the users’ mailboxes via the admin-account like we described in this article with Office 365.
We’ve already talked about migrating to and from both Dovecot and Google Apps for Business without having to reset the users’ passwords. In this post we’ll talk about doing the same for Microsoft Exchange.
Similar to Dovecot, Microsoft Exchange also supports IMAP login using a modified username-string. In Exchange, this string looks like this:
Domain/AdminUser/UserName
Just like Dovecot, Google Apps also support logging in to users’ email account without resetting the passwords. Unfortunately, this feature is not available for Google Apps Standard-users (i.e. free), but is restricted to Google Apps for Business-users (and Education).
The way Google resolved this was to add support for OAuth authentication to their IMAP server. Hence, to use this feature, you will need an OAuth key.
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Let’s face it — having to reset the users’ password when doing an e-mail migration is a big pain-point. End-users don’t like having their passwords changed, and the tech-folks don’t like the storm of support calls from frustrated users who can’t get to their email. That is on top of the issues that might arise when users changes their password from the password the admin changed it to mid-migration.
All in all, it’s a pain. Luckily, there are ways around this for some email services and servers. Dovecot is one of them. Unfortunately Dovecot isn’t configured to support this by default (in most systems), but in this article we’ll tell you how to enable it.
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