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Iron Contributor

Aug 07, 2017

Solved

Migrate Exchange Hybrid Server to other domain

Hi, At a customer we have migrated almost all of the mailboxes from two different domains to One Office365 tenant. Now that we are almost done we are looking into the posibilities of migrating the Hy...

exchange online

NunoAriasSilva
Aug 08, 2017
Hi Jerry,

You have to Setup a new Installation of Exchange Server on Domain B.

After instalation of the new Exchange Setup, you have to Uninstall Exchange on Domain A and then Run the AD Connect Again to discover the new Exchange and after that changes you Have to setup a new Hybrid Configuration Wizard on Exchange on Domain B.

MVP

Aug 07, 2017

From a hybrid perspective - do you plan to leave any users or resources in Exchange on-premises? Or is the hybrid "server" purely for GUI management of Exchange Online users?

Jerry Meyer
Iron Contributor
Aug 07, 2017
The Hybrid server will only be used to manage users in Exchange online. All users will be moved to Office 365
- NunoAriasSilva
  MVP
  Aug 08, 2017
  Hi Jerry,
  
  If you just want to manage the users in Exchange Online and you want to keep Exchange Hybrid, you have to keep only one hybrid server connected to your Office 365.
  
  You have to migrate the rest of the mailboxes that you need to migrate to Office 365 than Install other Exchange on the other domain an turn it hybrid. Note: You have to change your configuration of your AD Connect to acomplish that.
  - Jerry Meyer
    Iron Contributor
    Aug 08, 2017
    Status updat: we now have migrated everybody over to Exchange online.
    So the situation now is
    
    All mailboxes are in Office 365
    Users are synced from 2 domains (DomainA (mailresource domain) and DomainB (userresource domain).
    The hybrid server is still in domain A.
    
    The question now is can we and how do we move the Hybrid server over From DomainA to DomainB. And does this impact our AzureAd Connect which is syncing from DomainA and DomainB

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