michaelMy guest for this episode is Michael Van Horenbeeck.

Michael is a Microsoft Certified Solutions Master, and an Exchange Server MVP from Belgium. He works for Enow, a company that provides systems management software for Microsoft technologies, specializing in Exchange, Office 365, Active Directory and Skype for Business.

This episode of the Exchange Server Pro Podcast is brought to you by Office 365 for Exchange Professionals, the most comprehensive and up to date guide to Microsoft’s Office 365 cloud services. Find out more at Office365forExchangePros.com.

In this episode Michael and I discuss Hybrid Exchange deployments with Office 365, and what’s new in Hybrid for Exchange Server 2016.

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About the Author

Paul Cunningham

Paul is a former Microsoft MVP for Office Apps and Services. He works as a consultant, writer, and trainer specializing in Office 365 and Exchange Server. Paul no longer writes for Practical365.com.


  1. Olomola Oluseun

    Hi Paul,

    I am deeply concerned about the on-premise Exchange server decommissioning.

    My environment has about 250 users with Exchange 2010. My option is Hybrid, but the business requirement is that we decommison on premise exchange.

    Please advice

    1. Avatar photo
      Paul Cunningham

      The hybrid configuration can be used as a migration strategy. It requires directory synchronization. If you plan to keep directory synchronization running after completing the mailbox migrations to Exchange Online, then you’ll need to keep the on-premises Exchange server.

  2. Taiwo

    Hi Paul,
    Insightful podcast, welldone
    Why keep an Exchange server for management purposes in an initial Hybrid setup , after all on-prem mailboxes have been migrated to the cloud?
    There should be a way to completely decommission on-prem Exchange Servers

    I also realized that If you have a moderated DL on-prem and your mailbox is in the cloud, as a moderator you get errors when you try to moderate emails sent to the DL. Please can you explain why and possibly offer a solution?

  3. Andy Helsby

    I haven’t listened to this podcast yet, but have listened to the rest of them (apart from ep4 that won’t play in my player for some reason) and was wondering if you would talk about why you need to leave an exchange server in AD when you migrate to office365 in a hybrid environment.
    As far as my clients are concerned, they are trying to decommission their old exchange servers and move to office365, have azureconnect for synching so they have the same password, and then when they are told they need to keep their old exchange server running, they are not very happy….
    I am not sure why Microsoft seems to think this has to be a big secret and tell people to call support.

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