Solved

Moving a 23GB Mailbox from Exchange 2003 to Exchange 2010

Posted on 2011-02-11
10
777 Views
Last Modified: 2012-08-13
I am doing an exchange migration for a client and ran into a little surprise.  I moved all mailboxes from exchange 2003 to the exchange 2010 server, but one, which is a 23GB mailbox.  My question is has anyone ever moved a mailbox this size from exchange 2003 to exchange 2010?  Will it move successfully?  I haven't attempted to move it yet.  Any advice would be greatly appreciated.  Thanks.
0
Comment
Question by:denver218
  • 3
  • 3
  • 2
  • +2
10 Comments
 
LVL 16

Expert Comment

by:Auric1983
Comment Utility
With such a large mailbox you might run in to a lot more corrupt messages than with a small mailbox, so you may have to set your threshold for corrupt messages higher.  

That being said, if you have a good backup there is no harm in trying, worst case the move fails and the mbx stays on the 2003 server?

Exmerge is out unfortunately as it's limited to a 2gb PST file.  The only other way I could think to move a mailbox of this size is by opening the mailbox in outlook and doing a File > Export to a unicode PST file.  

0
 
LVL 74

Expert Comment

by:Glen Knight
Comment Utility
Exmerge can filter the mailbox if required but it shouldn't be needed.

I have moved mailboxes larger than that without any problems, I would suggest doing it over a weekend though.
0
 
LVL 10

Expert Comment

by:Muzafar Momin
Comment Utility
yes go ahead and move the mailbox
0
 
LVL 41

Expert Comment

by:Amit
Comment Utility
Unicode format supports max 20GB PST. I would suggest you to export mulitple PST in 2GB size. Export them Folder wise. Once all data is exported out. Delete that from the user mailbox. This will reduce the mailbox size. Then move the mailbox, later import all PST. Safe and secure method.
0
 
LVL 74

Accepted Solution

by:
Glen Knight earned 500 total points
Comment Utility
There is more chance of data loss exporting to PST than there is using the move mailbox wizard.
0
Better Security Awareness With Threat Intelligence

See how one of the leading financial services organizations uses Recorded Future as part of a holistic threat intelligence program to promote security awareness and proactively and efficiently identify threats.

 
LVL 41

Expert Comment

by:Amit
Comment Utility
In what way, Data can be lost. I am doing it from last 8 years.
0
 
LVL 4

Author Comment

by:denver218
Comment Utility
Thanks.  I really don't want to go the PST route if possible.  demazter, you said above you have moved mailboxes that were bigger than 23GB successfully in the past to exchange 2010 correct?  I think I will take that approach and start the move this evening and let it go into the weekend.
0
 
LVL 74

Expert Comment

by:Glen Knight
Comment Utility
Yes I moved mailboxes that size and bigger without problems.

>>>In what way, Data can be lost. I am doing it from last 8 years.

Then you really need to re-think your migration strategy.  I specialise in Exchange migrations and have never had to export to PST.

The use of PST files can cause dataloss because on a mailbox that size you would have to do around 15 passes using emerge to get all the data out. If you don't get it right you will lose data.  You are also exporting to different storage away from exchange, another potential data loss.
0
 
LVL 41

Expert Comment

by:Amit
Comment Utility
Thanks for your suggestion
0
 
LVL 4

Author Closing Comment

by:denver218
Comment Utility
Thanks.
0

Featured Post

Zoho SalesIQ

Hassle-free live chat software re-imagined for business growth. 2 users, always free.

Join & Write a Comment

Utilizing an array to gracefully append to a list of EmailAddresses
Not sure what the best email signature size is? Are you worried about email signature image size? Follow this best practice guide.
This tutorial will walk an individual through the steps necessary to join and promote the first Windows Server 2012 domain controller into an Active Directory environment running on Windows Server 2008. Determine the location of the FSMO roles by lo…
This video discusses moving either the default database or any database to a new volume.

771 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now