I want to migrate ExchangeServer with the same host name

Question

Thank you

*I am translating what I wrote in Japanese into English using translation software, so I apologize if there are any mistranslations.

We are planning to migrate to Exchange Server 2019 due to the end of support for Exchange Server 2013.

Exchange Server uses only email, [PaaS] is used, and the server configuration is as follows.

　ExchangeServer2013

　　OS：WindowsServer2012R2

　　hostname(FQDN):ExchangeServer01(ExchangeServer01.domain.co.jp)

　　IP：192.168.1.100

　ExchangeServer2019

　　OS：WindowsServer2019

　　hostname(FQDN):ExchangeServer01(ExchangeServer01.domain.co.jp)

　　IP：192.168.1.200

I think that "New-MoveRequest" can be used for simple migration,

This time, we would like to migrate to Exchange Server 2019 without changing the host name (FQDN).

Therefore, I have the following plan, but please let me know if it can be handled.

--Plan start--

1. Prepare Exchange Server 2019 for relay

　Exchange Server 2019 for relay

　　OS：WindowsServer2019

　　hostname(FQDN):ExchangeServerRelay(ExchangeServerRelay.domain.co.jp)

　　IP：192.168.1.150

2. Migration from Exchange Server 2013 to Exchange Server 2019 for relay
3. Operation test of relay Exchange Server
4. Remove Exchange Server 2013 from the domain and shut it down
5. Prepare the destination Exchange Server 2019
6. Migrate from Relay Server 2019 to Destination Exchange Server 2019
7. Operation test of migration destination Exchange Server
8. Remove Exchange Server 2013 for relay from the domain and shut it down

--Plan End--

Answer 1

Hi @sakura_snow_blossom

I think that "New-MoveRequest" can be used for simple migration

Do you have active mailboxes on Exchange 2013 server or your organization only uses it for email relay?

This time, we would like to migrate to Exchange Server 2019 without changing the host name (FQDN).

Unfortunately it is not possible to directly use the exact same FQDN for the new Exchange 2019 server as the old Exchange 2013 server.

As it may cause conflict in Active Directory.

A thread in the similar situation: Can I name my 2019 exchange server at any time?

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Would it be possible to use another host name than ExchangeServerRelay?

If it is possible to use another host name, you can follow the steps in the Exchange deployment assistant (once you input the required information) to deploy Exchange 2019 server and migrate from Exchange 2013 to Exchange 2019.

If it is not possible to use another host name, to me you may need to:

1. deploy another temporary Exchange 2019 server for mailbox migration with another host name than ExchangeServerRelay
2. migrate all mailboxes and configuration to this temporary Exchange server
3. uninstall Exchange from the Exchange 2013 server and rename the server to another host name than ExchangeServerRelay
4. prepare a new server for the Exchange 2019 server with the host name ExchangeServerRelay and install Exchange 2019 on it
5. migrate mailboxes and configuration from the temporary Exchange server to the Exchange 2019 server
6. uninstall Exchange from the temporary server

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