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  • BPOS to Office 365 Transition
    18 November 2011
    1:31 PM

    Category:Cloud Services
    Post By:AvePointSA

    ​As a Microsoft BPOS customer, you have received a lot of communications about Office 365 at this point. You have probably also been notified about your transition date and schedule.  In this post, we will go over what to expect during the transition and how to prepare for it. 

    BPOS to O365 Plans:

    The name of your plan will change. Here is how the old plans will map to the new plans:


    ​Office 365

    ​BPOS Full Suite

    ​Office 365 - Plan E1

    ​Exchange Online

    ​Exchange Online - Plan 1

    ​Exchange Online - Deskless

    ​Exchange Online - Kiosk

    ​SharePoint Online

    ​SharePoint Online - Plan 1

    ​Office Communications Online

    ​Lync Online - Plan 1

    ​Office Live Meeting

    ​Lync Online - Plan 2


    Key Areas of Change

    • Live Meeting will be replaced by Lync Online.

    • After transition customers should replace the Live Meeting add-in for Outlook with the Lync Online add-in for Outlook

    • Live Meeting service will remain running for some time after Office 365 general availability to give customers time to move their recurring Live Meeting conferences to the Lync Online service

    • The Outlook Web App and the portal URLs (Admin, Customer, My Company) will change

    • The Sign In application will no longer be needed and there will be a new, one-time setup package called the Online Desktop Setup that is used for initial configuration and updating of end user computers

    • Rich coexistence describes the ability to share free/busy availability information between users with on-premises mailboxes (on Exchange Server) and users with online mailboxes (in Exchange Online). It requires at least one Exchange 2010 Server CAS server role deployed on-premises.

    Office 365 will have new system requirements around client software. The 3 key new requirements are as follows:

    • Office 2003 is not supported. Office 365 will refuse connections to Outlook 2003 (except as an SMTP client). Other Office 2003 programs may work in some circumstances, but Microsoft will not support this configuration. 

    • Internet Explorer 6 is not supported. Office 365 will not refuse connections to IE6, but the experience will not be user friendly. For example, SharePoint 2010 could require users to log in each time they click on a link.

    • None of the rich UI of Outlook will be function correctly—users will be relegated to OWA Light, which is a stripped down version of OWA.

    • Office Communicator 2007 R2 will no longer be supported, but the move to Lync should be a much smoother experience.

    Single Sign-on (SSO)

    • The BPOS Sign-In Application will no longer be needed and there will be a new, one-time setup package called the Online Desktop Setup that is used for initial configuration and updating of end user computers.

    • Federated identity is optional and will enable single sign-on (SSO) but it does require deploying one or more ADFS 2.0 server roles on premises.


    Office 365 has updated strong-password requirements. When users reset their passwords via the normal password expiration process, new passwords must contain a minimum of 8, and a maximum of 16, characters. Users must reset their passwords before transition. You can force this with the password expiration policy.

    More Information on the new features and functions at:

    Transition support

    The transition is designed to allow you to manage and administer yourself, and the Transition Center contains step-by-step guidance for doing this.

    If you need additional assistance, B2B offers a variety of support options to give you just what you need. In some circumstances Microsoft will pay for these support services. Please contact Kathryn Ewing at to learn more.


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