The My Company portal is not present after the transition from Business Productivity Online Suite to Office 365

After your Microsoft SharePoint Online site is transitioned from Microsoft Business Productivity Online Suite to Microsoft Office 365 for enterprises, you no longer have a My Company portal site.

This issue occurs because Office 365 does not support the My Company portal site as it was present in Business Productivity Online Suite. Instead, a new Team Site is created, and a link is included on the Microsoft Office 365 portal site. This site is linked to from the Microsoft Office 365 portal page and is located at https://YourDomain.SharePoint.com, where YourDomain is the domain name that you use for SharePoint Online in Office 365.

As of January 2012, the portal page is automatically created with a list of site collections which are security-trimmed based on the search results for the user visiting the site.

If at any time, you must manually add the list of site collections to the page, a Search Query Web Part will generate the site collection list. To add the Search Query Web Part to your portal page, follow these steps:

1. Browse to the Team Site page where you want to add the site collection list.
   
   Note To follow these steps, you must have a permission level that enables you to edit the page.
2. Click Site Actions, and then click Edit Page.
3. Click Add a Web Part.
4. Select the Web Part that is named Search Core Results, and then click Add. When you do this, the new Web Part is added to your page.
5. Click the drop-down arrow in the upper-right section of the Web Part, and then click Edit Web Part.
   
   
   
   
6. On the right side of the screen, in the Search Core Results Web Part properties page, expand the Results Query Options section.
7. In the Fixed Keyword Query text box, type Contentclass:sts_site, and then click OK.
   
   
8. In the Ribbon on the upper-left section of the page of your Team Site, click Stop Editing to exit edit mode.
9. Your page will now display the Web Part that has a fixed query that returns search results that list all site collections that the user has access to.