Reliable mailbox transfer

I have to transfer several mailboxes from hmailserver (connected via IMAP) to an Exchange 2016. The biggest of these mailboxes has about 40 GB mails.

All methods use so far either create errors or incomplete mailboxes:
  • Transfer via MailStore Server (Import via IMAP, Export to Exchange or PST or Outlook
  • Thunderbird connected via IMAP to both mailservers and manually copy/paste mail folders
  • Outlook dito

Additional problem ist that none of the methodes used gives a report of mails transferred per folder. Thus I have to manualle check source mailbox and target mailbox.

Can you give me an idea of the most realiable methode (optimally reporting the mails transferred per folder)?

Many thanks - Michael
Who is Participating?
Jose Gabriel Ortega CConnect With a Mentor CEO J0rt3g4 Consulting ServicesCommented:
Well, do a PST locally.
and upload it from a High-speed connection to o365 using the load of the pst on the 2016.

Since it has a big size, you should tolerate some errors.
And of course some data eventually will lose, a pst of 40 Gb is such a huge source of errors.
Jose Gabriel Ortega CCEO J0rt3g4 Consulting ServicesCommented:
Those are pretty big mailboxes.

I'd use migrationwiz
It's what I use when everything letting me struggle. you need to buy a license for each mailbox creating errors.
Also, have reports for data transferred (total not by folders).
sg08234Author Commented:
Thanks, but : Unfortunately the customer only has slow internet connextio. Thus any solution via Internet for 40 GB mailboxes will not work..

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Sandeep KumarConnect With a Mentor Associate ConsultantCommented:
Jose is right. You can use import/export method to migrate your mailboxes to Exchange server.

Kernel for Exchange Server can easily export PST to Live Exchange server. It can easily migrate any no of mailboxes without any size issue.
For more details and steps, visit
sg08234Author Commented:
Many thanks! Sounds good - I'll look deeper into it the next days - Michael
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:

-- Jose Gabriel Ortega C (https:#a42429509)
-- Sandeep Kumar (https:#a42431132)

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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