Zimbra, anyone?

[R. Stella]

Folks,

I'm trying to reach out to anyone who has done a Zimbra email migration to Google Apps.   In our project we are now looking at transferring email and not sure how others have done this.  Google's migration tool seems useless to us - it expects us to either know all zimbra accounts passwords, or for us to reset them.  We have 12,000 accounts (coming from two servers - 10K on one, 2K on the other one, with roughly the same amount of data - about 700gb) and clearly this would take some time.  The tool's ability to do a few at a time, and then restart and continue where it left off would be great - do as much as possible ahead of time, then on cutover time, finish up.

But the password issue is a show stopper.  So, how have others done this?

Thank you in advance.

PS:  If you've also done an Oracle Calendar migration, please let me know as well.

[Fred Hicks]

Stella,

    Is Zimbra storing all of its usernames and passwords locally or are they in an LDAP server?  

Fred

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[Keelan Cleary]

We at Bucknell University migrated around 8000 accounts from Zimbra to Google Apps back in 2010/2011.  We wrote our own scripts to migrate contacts and re-propose meetings in Google from exported Zimbra ics files.  We used imapsync to migrate email.  

With imapsync, we were able to use a Zimbra admin password to access the end user's email from the source server.  At the time, we needed to temporarily reset the end users password on Google Apps to one that we knew - I don't know if there is a better way to handle that now.  Since we were syncing a sha1 hash of the users pw from our AD to Google, we were able to store the sha1 of their pw in an other location in order to switch their Google pw back to the original after their mail finished migrating.  They were able to access their gmail account throughout the process because when SSO is setup, the end users google-stored pw is only used for smartphones, imap, and pop.  We synced with imapsync in the weeks leading up the transition and then did a final sync during the migration.

We created a transition website to inform end users about specific issues we identified with their Zimbra emails, files, folders (email sizes, bad file/folder names, etc) that would need to be corrected before the migration in order to avoid known problems.  Via the website, we allowed students to start their own migrations over a couple of months. We migrated all faculty and staff over a single weekend because we decided that it'd be a nightmare to try and make calendaring work with users split between Zimbra and Google.  All users were able to follow the details of their individual migration status via the website. 

If you have any more questions, feel free to ask.

-Keelan

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Keelan Cleary
Systems Integrator
Library and Information Technology
Bucknell University

On Thu, Mar 14, 2013 at 2:29 PM, R. Stella <ste...@rider.edu> wrote:

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[Ricardo Stella]

Thanks Keelan!

Our google rep pointed me to us, however the contact name he gave me bounced when I tried sending an email.

If you don't mind, can I run a couple of questions thru you?  How long did the transfer take?  And about how much mail did you guys had before?

Finally, are you guys willing to share any scripts you may still have around (hopefully) so we don't reinvent the wheel?

It seems we cannot sync the hash of our passwords we have as they are salted, however, we will be setting all google passwords to a new one, and will force users to reset theirs upon cutover.   We will need to do a sync ahead, and final sync at cutover.

Thanks for your help in advance.

Ricardo.

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