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Zimbra to Exchange

Hello everybody,

I have a project : Zimbra 8.0.7_GA_6021.NETWORK to Exchange 2013 with around 1000 mailbox.

Two way for me :

- I found software Zimbra Converter but the process is not automatic
- Create gateways between Zimbra and Exchange and let the user drag and drop email between the Zimbra Mailbox and  the Exchange Mailbox in Outlook (problem people use the webmail)

What is the best way to make a migration ? Ideas ?

Thx for your help.

Regards,

Clément
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archinet
Asked:
archinet
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4 Solutions
 
Miguel Angel Perez MuñozCommented:
I suggest you consider do this:

Create all mailboxes on your Exchange infrastructure.
Set a migration day. This day you change your inbound email from Zimbra to Exchange (simply change your MX records)
Instruct your users (or use any commercial software) to export email from Zimbra to PST.
Import this PST to Exchange mailboxes (you have a cmdlet)
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archinetAuthor Commented:
Hi Miguel,

You are right but people don't use outlook only Webmail.

1000 Zimbra accounts to Exchange will be not easy with converter tools.

I search an automatic system or less binding.

Regards,

Clément.
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Miguel Angel Perez MuñozCommented:
You can use this tool to export to PST from Zimbra server: http://zimbramailconverter.wordpress.com/2013/07/25/zimbra-converter-all-in-one-tool-to-export-zimbra-to-pst-file/

Save your PST to shared folder on Exchange Server, then you can use a little script to make a bulk import of this pst. On this website has detailed procedure: https://www.simple-talk.com/sysadmin/exchange/importing-psts-with-powershell-in-exchange-2010-sp1/

Is quite automatic.
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archinetAuthor Commented:
I contacted the editor of Zimbra Converter and the tool convert only mailbox one by one.

No way to make an automatic process.

Regards,

Clément
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skullnobrainsCommented:
imapsync can do a nice job : you can synchronise less users at a time, or only email posterior to a specific date (so you can synchronise during as long as it takes, and resynchronise last month's worth of email over the week-end, for example)

other things that can help include the possibility to duplicate received email from the zimbra on the exchange : you can for example synchronise only last month's worth of the users inboxes, and propagate the archives over a few days which should be quite acceptable for the users (just clearly let them know what you are doing so they won't spend half a day deleting email on the wrong side)

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the problematic part is rather calendars and contacts. as far as i remember calendars can be exported from zimbra in a way exchange can understand.

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note that it is also quite acceptable to keep both servers up, and just not bother about migrating (or later on). most users can handle a main mailbox, and a secondary mailbox with archives, so you probably can migrate only webmail-only users to start with, and go on with the rest little by little

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out of curiosity, i'm interested into your experience regarding why you leave zimbra for exchange
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SandyCommented:
completely agree with skullnobrains...

having same curiosity too.. :)

TY/SA
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Miguel Angel Perez MuñozCommented:
Sorry, I was convinced Zimbra converter do bulk export.
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archinetAuthor Commented:
out of curiosity, i'm interested into your experience regarding why you leave zimbra for exchange

Lots of problems :

- Outlook Plugins (no sync correctly)
- HA not fully functional

An expert Zimbra has configured the system but same problems...

Regards,

Clément.
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SandyCommented:
Outlook plugins like ? Dynamics  and all ?

Apart from that licensed version of Zimbra has HA in fully functional mode.. What all are the challenges ?

Ty/SA
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archinetAuthor Commented:
Outlook Zimbra connector is stuck all time it's really not normal in production mode.

I think Zimbra is not a competitor for Exchange since VMWARE has sold this product to Telligent (it's my opinion).

Now the customer want another solution thus : Exchange.

I ask your help to validate our migration process or give tricks.

Thx.

Regards,

Clément.
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SandyCommented:
ok.. so i would also suggest to go with imapsync as you mentioned it is all webmail data so this will be server to server mailbox migration. No PSTs anymore...

you can export the list of users from zimbra and create users and mailbox in AD by importing them afterwards you can perform imapsync on mailbox data to accomplish the task.

TY/SA
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archinetAuthor Commented:
Only problem with IMAPSYNC we must find another way to export contact and calendar.

Have you an idea ?

Regards,

Clément.
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SandyCommented:
GAL will be auto created by exchange and AFAIK and remember calender content will also be synced..

Let me check if i can get something for you

TY/SA
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archinetAuthor Commented:
GAL does not contain the private contacts.

Thx for your help Sandy !!

Regards,

Clément.
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SandyCommented:
That's true...
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skullnobrainsCommented:
zimbra can export calendars to ical format which exchange can import

likewise contacts can be ex/imported in vcard format

bulk import should not require scripting given the available commands but it's a matter or a few lines or possibly a little help on the users side (such as importing their contact files in outlook or just moving them themselves in outlook which is rather trivial and would not load either server even if all user were doing it at once) otherwise
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