New in the Office Store is the Public Site Content Migration app.

Image may be NSFW.
Clik here to view.

You can use this app to copy pages, documents, images, navigation, and more from your existing website to your new website in Office 365. Learn more about the new Public Website in Office 365.

How does it work?

If your Office 365 account was recently upgraded, you’ll notice that you end up with two public websites. On the Sites page in Office 365, you’ll see the two websites like this.

Image may be NSFW.
Clik here to view. 

The Public site (middle) is your current website and the New public site (right) is the new website introduced with the upgrade. With both websites available, you can take your time learning how to use the new website and upgrade websites at your own pace. Or, if you’re not using your current website, then don’t upgrade at all.

To start the upgrade, go to the new website and install the Public Site Content Migration App. (Choose Settings Image may be NSFW.
Clik here to view. > Add an app select SharePoint Store and search for Public Site Content Migration App.)

Once you install it, open the app on your new website. (Settings Image may be NSFW.
Clik here to view. > Site contents > Public Site Content Migration.) You’ll see this.

Image may be NSFW.
Clik here to view. 

Follow the instructions, which starts with installing the migration app on your existing (pre-upgrade) website then returning to the migration app on your new website to finish. (Your existing website must be upgraded to the latest version of SharePoint before you can install the migration app there.)

What then?

When you finish migrating content from your existing website to the new website, it’s time to fine-tune your new website. This includes changing the look and feel, applying new page layouts, and adding website apps. In particular, you’ll notice that the gadgets from your existing site were not migrated, so you’ll want to recreate those using the built-in features or downloadable apps.

Switching to the new site

When you’re finished migrating content and customizing the new website, you’re ready to switch to the new public website. You do this in two steps. First, make the website public so that everyone can see it. (You do this from the new website itself.)

Then, you change the website address (URL) of the new website so it uses your custom domain name, (like www.contosobistro.com). This assumes you own a custom domain name; if not, then there’s no additional step here.

Where can I learn more?

Go to the article Upgrade your public website to learn more about the migration app and the overall upgrade process.

If you have questions or comments, post them here and the Office 365 community.

Thanks,

Tom
Technical Writer
Office 365/SharePoint Online

Image may be NSFW.
Clik here to view.