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Dean Suzuki Blog

Title: Setting Up Exchange Hybrid and Migration Batches

Created: 6/16/2014

Description:

I have been working to setup Exchange Hybrid between an on-premise Exchange environment and an

Exchange in Office 365 environment. This post documents the steps to running the Exchange Hybrid

Configuration Wizard and then migrating a mailbox from On-Premise to Exchange Online.

References

http://technet.microsoft.com/en-us/library/hh852414.aspx ; Plan an Exchange Online hybrid

deployment in Office 365

http://blogs.technet.com/b/exchange/archive/2014/05/27/released-exchange-server-2013-

cumulative-update-5.aspx ; Released: Exchange Server 2013 Cumulative Update 5

http://www.microsoft.com/en-us/download/details.aspx?id=43103 ; Cumulative Update 5 for

Exchange Server 2013 (KB2936880)

http://technet.microsoft.com/en-us/library/jj200581(v=exchg.150).aspx ; Exchange Server 2013

hybrid deployments

Disclaimer:

Contents of this blog and article represent the opinions of Dean Suzuki, and do not reflect the views of my employer. (C) 2012 Dean Suzuki, All Rights Reserved

Procedure:

Table of Contents 1 Download and Install E2013 CU5 .......................................................................................................... 2

2 Hybrid Configuration ............................................................................................................................. 3

2.1 Directory Synchronization Replication Limits ............................................................................... 3

2.2 Hybrid Deployment Management ................................................................................................ 3

2.3 Mobile devices .............................................................................................................................. 4

2.4 Public Folders ................................................................................................................................ 4

2.5 Coexistence Domain ..................................................................................................................... 4

2.6 Hybrid Configuration Wizard (HCW) ............................................................................................. 5

2.7 Certificates .................................................................................................................................... 5

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3 Running the Hybrid Configuration Wizard ............................................................................................ 5

4 Migrating A Mailbox from Exchange On-Premise to Exchange Online............................................... 11

4.1 Enabling MRS Proxy .................................................................................................................... 11

4.2 Migrating the Mailboxes ............................................................................................................. 12

5 Renewing Certificate ........................................................................................................................... 15

1 Download and Install E2013 CU5

My environment was running Exchange 2013. There were some enhancement to the Exchange Hybrid

Configuration Wizard in Exchange 2013 SP1. Specifically, SP1 added support for multi-Exchange

Organization support to Office 365. Rather than downloading E2013 SP1, I checked for the latest

Exchange release at this time (6/16/2014) and it was E2013 Cumulative Update 5. It build upon

Exchange 2013 SP1. See http://www.microsoft.com/en-us/download/details.aspx?id=43103 for

download.

So, I download CU5, expand it, and run setup.exe

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2 Hybrid Configuration

2.1 Directory Synchronization Replication Limits “Active Directory synchronization between the on-premises and Office 365 organizations is a

requirement for configuring a hybrid deployment. The Microsoft Office 365 service has an upper limit

for replicating mail-enabled Active Directory objects to the cloud-based organization of 50,000 objects.

If your Active Directory environment contains more than 50,000 objects, contact the Microsoft Online

Services support team to open a service request for an exception and indicate the number of objects

you need to synchronize”

(from http://technet.microsoft.com/en-us/library/jj200581(v=exchg.150).aspx)

2.2 Hybrid Deployment Management “You manage a hybrid deployment in Exchange 2013 via a single unified management console that

allows for managing both your on-premises and Office 365 Exchange Online organizations. The Exchange

admin center (EAC), which replaces the Exchange Management Console and the Exchange Control Panel,

allows you to connect and configure features for both organizations”

(from http://technet.microsoft.com/en-us/library/jj200581(v=exchg.150).aspx)

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Can manage both On-premise and Online Exchange from the same web console.

2.3 Mobile devices “Mobile devices are supported in a hybrid deployment. If Exchange ActiveSync is already enabled on

Client Access servers, they’ll continue to redirect requests from mobile devices to mailboxes located on

the on-premises Mailbox server. For mobile devices connecting to existing mailboxes that are moved

from the on-premises organization to Exchange Online, the Exchange ActiveSync partnership must be

disabled and re-established before redirection requests are processed correctly. All mobile devices that

support Exchange ActiveSync should be compatible with a hybrid deployment.”

(from http://technet.microsoft.com/en-us/library/jj200581(v=exchg.150).aspx)

2.4 Public Folders “Public folders are now supported in Office 365 and on-premises public folders can be moved to

Exchange Online. However, Exchange Online mailboxes can only access public folders located in

Exchange Online and on-premises mailboxes can only access public folders in the on-premises Exchange

organization. Existing on-premises public folder configuration and access for on-premises mailboxes

doesn’t change when you configure a hybrid deployment.”

(from http://technet.microsoft.com/en-us/library/jj200581(v=exchg.150).aspx)

2.5 Coexistence Domain “The wizard adds an accepted domain to the on-premises organization for hybrid mail flow and

Autodiscover requests for the cloud organization. This domain, referred to as the coexistence domain, is

added as a secondary proxy domain to any email address policies which have PrimarySmtpAddress

templates for domains selected in the Hybrid Configuration wizard. By default, this domain is

<domain>.mail.onmicrosoft.com.”

(from http://technet.microsoft.com/en-us/library/hh529921(v=exchg.150).aspx)

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2.6 Hybrid Configuration Wizard (HCW)

(from http://technet.microsoft.com/en-us/library/hh529921(v=exchg.150).aspx)

2.7 Certificates Exchange Hybrid makes extensive use of certificates. See http://technet.microsoft.com/en-

us/library/hh563848(v=exchg.150).aspx

3 Running the Hybrid Configuration Wizard Launch the Exchange Control Panel web page (e.g. https://<domain>/ecp)

Go down to Hybrid

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Press Modify and you will be prompted to login to O365

Can enable centralized transport

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4 Migrating A Mailbox from Exchange On-Premise to Exchange Online

4.1 Enabling MRS Proxy Exchange Online needs to talk to the MRS Proxy on-premise to perform the mailbox replication. The

MRS Proxy needs to be enabled on the CAS server that Exchange Online communicates with.

See the following article for more info: http://technet.microsoft.com/en-

us/library/dn155787(v=exchg.150).aspx

On the on-premise Exchange console, go to Servers > Virtual Directories

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Double-click the EWS for the Exchange 2013 CAS that will be the MRS Proxy.

Check the “Enable MRS Proxy endpoint” checkbox

4.2 Migrating the Mailboxes

Perform the move from Exchange Online administration console. The move is called a Migration Batch.

Go to the Office 365 Exchange Admin Center and then go to: Recipients > Migration

Press the “+” and select “Migrate to Exchange Online”

Remote Migration Move

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When the migration is complete, the following screen will show.

5 Renewing Certificate I also noticed that my certificate needed to be renewed so I am documenting the procedure to renew

the Certificate

Go to Exchange Admin Center on-premise

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Go to Servers > Certificate

Notice the certificate that is expiring and hit “Renew” (in blue) on right hand side.

Generate the renewal certificate request.

Take the certificate request to my certificate provider (Digicert.com)

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Submit the certificate and wait for the response.