• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 1100
  • Last Modified:

How can we do a rollback with the migration 2007 to 2013

Hello,

Last week I have started with the migration of my exchange 2007 to Exchange 2013.
Everything was working fine.  4 days ago, I migrated all mailboxes to the database of Exchange 2013.
To make simple, my new Windows 2012 with Exchange 2013 crashed today and my backup is not usable to restore the exchange database.  So All my mailboxes are linked to a database which don't exist anymore and I won't be able to restore it.
I have full backup of my old Exchange 2007 server but all mailboxes are now linked to the new one.  Everything is synchronized with Active Directory.
is there a way to do a rollback ?  It is possible to restore my exchange 2007 (restore point before the migration of all mailboxes) and make changes in AD to point mailboxes to the old exchange server ? (I know I would loss emails between this time but I don't have other solution).  

Thanks in advance for your help
0
SA-IT
Asked:
SA-IT
  • 4
  • 4
  • 2
1 Solution
 
Simon Butler (Sembee)ConsultantCommented:
I would suggest a call to Microsoft support to begin with. This is a DR scenario and that is what they are best at.

Do you have anything salvageable from the Exchange 2013 server? What kind of failure was it?
Exchange is pretty easy to recover, but it depends on what can be salvaged.

Have you removed the Exchange 2007 server?

Simon.
0
 
SA-ITAuthor Commented:
No my backup isn't usable... I don't have the database  :(
I only have a full and usable backup of my exchange 2007.
Exchange 2007 is still up and not removed yet...
0
 
AmitIT ArchitectCommented:
First you should bring users and mailbox back to production. For this you need to re-install 2013 server with recover switch. Once your server is up. You can create a dial-tone DB and that will bring your user back to production. However without data. Next you need to look for 3rd party tool, which can extract data from edb to pst. Export the data and then merge it to user  mailboxes.
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
Simon Butler (Sembee)ConsultantCommented:
I didn't ask about the state of the backup, I asked about the storage.
The reason being that for most companies the most valuable data is less than 48 hours old. If you migrated four days ago then you are going to lose a lot of data.
It is a pretty unusual system failure to take out the server storage as well and leave you with nothing.

Simon.
0
 
SA-ITAuthor Commented:
Yes I also re-install 2013 server with recover procedure.  My exchange 2013 is UP.
How can I move existing users (linked to a old unavailable database) to a new database ?
If the old database is not online, I can't move to another database...
If you can help me with that it would be great.
I really need to get emails back in production...  I will find a solution to restore old emails later
0
 
AmitIT ArchitectCommented:
If your server is up, you can do the dial tone recovery
http://technet.microsoft.com/en-us/library/dd979810(v=exchg.150).aspx

However, I want to know, what do you mean by crash here? As Simon said, it is rare that your data also gone. If it is OS issue only your database will be still present and it will reattach to Exchange server, after doing recover server steps. However, if that is not the case, then you are left with option of doing Dial tone recovery and later using 3rd party tool to extract the data and merge it.
0
 
AmitIT ArchitectCommented:
Thanks for the points, I just logged in for you here at 3AM. Before you spend your money on any 3rd party tool, I might suggest you to create RSG on 2007, restore the DB, move one mailbox from 2013 to 2007 after doing dial-tone recover and then see if you can merge data to user moved back to 2007.

If not, extract data to pst from 2007 rsg db and merge it. Hope this helps.
0
 
SA-ITAuthor Commented:
Thanks for your help Amit.  Do you have more information to create RSG2007 ?  My old 2007 Exchange is still up but mailboxes were moved to the other Exchange 2013 database (which crashed).  Is the 2007 database still working ?
Do I need to restore the server before the moving ? Or is it possible to use it in recovery mode ?

Thanks in advance for your help
0
 
SA-ITAuthor Commented:
I Follow the link to work with the recovery group on my 2007 Exchange server :
"http://www.msexchange.org/articles-tutorials/exchange-server-2007/high-availability-recovery/Working-Recovery-Storage-Groups-Exchange-2007.html"

When I try to mount the database I get an error :
"Error encountered while trying to mount the database (Mailbox Database) in the recovery storage group (EqlRSG_First Storage Group). Error message is: Exchange is unable to mount the database that you specified. Specified database: ICKX\EqlRSG_First Storage Group\Mailbox Database; Error code: MapiExceptionJetErrorAttachedDatabaseMismatch: Unable to mount database. (hr=0x80004005, ec=-1216"
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

  • 4
  • 4
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now