Migrate from Gmail/Office365/old Exchange to Exchange 2019

[KAIZEN365]

Hello,

I have customer who have different email systems (Office365/Exchange 2013/Gmail) connected to different domains, now the target is to build a new exchange server with new domain (DC 2019 with Exchange 2019 and creating accepted domain for each one but we have the below challenges

1.one of the mains domains already connected to exchange 2013 and not stable in top of that this domain (X.com) joined to 200 PCs and almost 10 servers.
2.The above servers are Windows 2008 / Windows 2012 / Windows 2016 even they have windows 7
3.I have user e.g. email address removed for privacy reasons & email address removed for privacy reasons , same email with different domains and i need to send a receive email from both of them (Not Alias) so what is the best scenario for that.
4.About moving mailboxes from Gmail/Office365/Old exchange, what is the best way to do that smoothly with minimum down time.

So what is the best design for the above

Thank you.

[#2]

Hi @KAIZEN365 

you have to break it down and solve each issue separately . for the old exchange issue you can setup new exchange server and coexist both of them until you remove the old one.

and to migrate from gmail check the G-suit automatic migration will simplify the process for you.

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