Merge two Exchange Installations

I have following environment:
- two separate AD forests with a two-way forest trust between
 - both AD domains use a separate Exchange Server (Exchange 2013 in Germany, Exchange 2016 in Switzerland)
 - the Exchange environment in Germany should be decommissioned, all users in Germany have to be moved to Switzerland
 - the interconnection between Germany and Switzerland is very slow, therefore the migration has to take place using a EDB import or equal.  I don't know of any other feasible procedure.

I was thinking of following procedure:
- Ensure that Outlook Anywhere works properly in the site in Switzerland with Exchange 2016
 - Stop Exchange Services in Germany, transport the EDB and transaction Log files to Switzerland on a USB disk (around 400 GB data)
 - Import the EDB and transaction logs using Kroll OnTrack and restore them in Switzerland (https://www.krollontrack.com/products/email-recovery/)
 - Let the users in Germany re-create their Outlook profile using Outlook Anywhere

What do you think about this plan?
whenzAsked:
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Valentina PerezExchange ServersCommented:
Hi,

It is good plain. The first thing is to be sure that everything is working now in the Switzerland site

Or you can try to migrate users, try cross forest move

https://technet.microsoft.com/en-us/library/ee633491(v=exchg.160).aspx

Another option is to export PST and after import PST.

Regards
Valentina
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RoninCommented:
If you have enough bandwidth for your users to re-download OST file, why can't you create an new AD site on the same physical network as the second location and without a hassle migrate the data correctly and properly?
This means that instead of import / Export of the EDB file and bunch of other manual work, once the site is up and running simply migrate the server to virtual and ship it over same USB. Bring it up in the other site as VM.
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Seth SimmonsSr. Systems AdministratorCommented:
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

Split:
-- Ronin (https:#a42442014)
-- Valentina Perez (https:#a42441631)


If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

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