How to downgrade Exchange 2013 to 2010

exchange-2010exchange-2013licensing

I don't have the Exchange 2010 media but I have the 2013 media. I need to downgrade, and as far as I can tell 2013 has downgrade rights. I have a 2k3 Exchange environment. I am going to install 2010, move resources, upgrade to 2013. Is getting the 2010 media the only way?

Best Answer

Yes, you'll need to get the media, but it's easily available:

Exchange 2010 sp3 media

Base Exchange 2010

You can use that to install Exchange 2010 (I included the base in case you really want just the base, but the sp3 media should install full version ok IIRC)

To downgrade, you'll need to reach out to MS Licensing or your MS partner to get a new product key to be used with Exchange 2010 as the one with 2013 you received won't work.

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Updating to Exchange 2013 – any way to do it now

If there isn't even an officially supported upgrade path out there yet, may it be that Exchange 2013 is a bit... too young to actually deploy it in a production environment?

Reset Search Index in Exchange 2013

The ResetSearchIndex.ps1 script does not exist in 2013 so you have to do it manually. Instead of deleting the folder containing the index files (the one with the long GUID), you can rename it (after stopping the HostControllerService). When you restart the service it will create a new folder.

You can run the command:

    Get-MailboxDatabaseCopyStatus -Server <servername>| FL Name,*Index*

to see the status of the indexes BUT be patient as it may take a few minutes for the system to show the index crawling is active again.

I have done this on 2 mailbox databases.

Best Answer

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