Upgrading Exchange 2010 to Exchange 2013 Issues

Hi.

We want ot upgrade our Exchange 2010 server to Exchange 2013. The problem I ma having is that the Exchange 2010 server is running SP2 not SP3. We are having issues with the SP3 upgrade failing. I learned this the hard way mid way through the upgrade after all the checks had passed but the installer quit mid way due to not having the correct permissions on an OWA folder. By that time the old installation had already been removed and the installer would not move forward. My Exchange server was dead in the water and I had to use our backups to restore the entire VM.

So now I'm very hesitant to try this again. What are my options for an upgrade to Exchange 2013? Is it possible instead of going through the official migration process (which requires 2010 to be at SP3) to just spin up a new instance of 2013 and do an export of the mailboxes (PST) on the 2010 machine and import them onto the 2013 box? What are the limitations or potential gotchas going this route.
spinoza156Asked:
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spinoza156Connect With a Mentor Author Commented:
Just to let everyone know that I was able to identify and correct the permission on the OWA folder. It was a matter of taking ownership (from System to Domain Admins) and then letting all the permissions inherit from the parent folder to that folder and all sub folders. Once this was done I was able to successfully install SP3.

I tested this all in a test environment twice before doing it in production.

Thanks everyone for your contribution.

spinoza
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Tej Pratap Shukla ~DexterServer AdministratorCommented:
Hi,
There will not be any Gotchas in Export Exchange mailboxes into PST and import PST to Exchange 2013. If you think that there might occur situations like this then you can use any third party tool like Exchange ExportExchange Import and the support team will help you throughout the up-gradation process.
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IvanSystem EngineerCommented:
Hi,

You cant install 2013 in organization where 2010 is not on SP3, as posted on https://blogs.technet.microsoft.com/exchange/2013/02/12/released-exchange-server-2010-sp3/

This means that you will have to export mailboxes to .pst, remove exchange 2010, deploy 2013 and then create mailboxes, import data and so on...
That would be risky since you have no idea will uninstall go well, and also will install 2013 go ok, so if you get stuck with it your users wont have access to email for some time (or long time)...
That sounds bad :)

I personally would try with upgrade to SP3, and from there, continue normally with migration to 2013.


Regards,
Ivan.
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CodeTwo SoftwareSoftware DeveloperCommented:
Hi,

If you are not ruling out third party solutions, check out CodeTwo Exchange Migration.

The program supports migration of users' mailboxes (no downtime during the migration process) from Exchange 2010 SP2 to Exchange 2013.

In case of any questions, give me a shout.

Best regards,
Adam
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davorinCommented:
I must say that you are not in nice situation and as Ivan said - you need to successfully remove exchange 2010 from your organization prior to install exchange 2013. Or the second option is to create a new AD and do (cross-forest) migration. I'm not familiar with your environment, but in most cases I would rather  shoot myself in a knee than do the second option. That does not mean just migrating mailboxes, but migrating everything. Keep it like your last resort.
I would try to fix exchange 2010 first, hoping that it is only owa and not AD problem, and try to install sp3 again.
Resetting owa is not so difficult procedure:
https://technet.microsoft.com/en-us/library/ff629372(v=exchg.141).aspx
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davorinCommented:
I'm glad you have solved the problem. Thank you for feedback.
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spinoza156Author Commented:
I found my own solution
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