WSUS on Windows 2008 R2 to new server running Windows 2012 R2

I've decided to update our WSUS server from Windows 2008 R2 to Windows 2012 R2.  Part of this is to cleanup all the previous updates like XP and older Office updates that eat up so much space but aren't used anymore.  We no longer have XP or Office 2007 and older.  

We currently point clients to the current Windows 2008 R2 WSUS server via group policy.  

What is the best method to slowly transition clients to the new server?  Do I need to go through and re-approve everything or is there a way to pull over approvals from the old server (without approving the old XP and Office updates that I don't want anymore?)

Basically I want to start as clean as possible, but re-approving everything from scratch is going to be a huge and tedious task.  If I can pull over the approvals for only certain product groups that would be great.

I will be out for the next week on vacation, so I will check back in when I get back.  Forgive my slow response.
jpletcher1Asked:
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Casey WeaverNetwork EngineerCommented:
Microsoft has written an article to walk through this setup. You'll essentially migrate databases to the new server. After that, you can simply remove the Windows XP selection in WSUS on the 2012R2 server.

https://technet.microsoft.com/en-us/library/hh852339.aspx
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jpletcher1Author Commented:
I was hoping to be able to have both co-exist and move clients over a few at a time, but it seems like that isn't  possible?

What do you  mean by "simply remove the Windows XP selection"?  If I uncheck it that doesn't delete all the updates that have been downloaded for Windows XP.  I'm looking to clean up all the older, unnecessary binaries, but this article has you copying them all over.
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jpletcher1Author Commented:
Bumping this to bring attention to my previous question.  Thanks
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arnoldCommented:
It is possible.
One, Change the classification/product selection on your existing 2008 and run the cleanup wizard to get rid of the extra content.
Setup/install WSUS on your windows 2012 and subordinate it to the windows 2008 server (making 2012 WSUS server a replica of the 2008).
Approvals can only be made on the master/2008.
Depending on how your GPO structure is setup will dictate whether you can transition some clients one/a few at a time.

The 2012 wsus needs to be configured to sync data from the windows 2008.
This will both transfer the data as well as approvals.

You would need to recreate the auto-approval rules if any that you have on your 2008 on the 2012 after you make the 2012 the master whether or not you reverse the roles or not.

Both WSUS will need the same amount of space for the content.
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jpletcher1Author Commented:
Unchecking the boxes in the product selection for Windows XP/2003 and then running server cleanup doesn't remove any of the updates for said products.  You have to go in and decline the updates where they are listed out individually in the updates area and then run server cleanup.  This is very time consuming :(
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arnoldCommented:
The cleanup includes the decline option that unneeded, experied once unchecked, unneeded will fall into that category, I believe.

The auto approval, can be used to auto decline based on product/category, product and category need to be enabled to have the option/selection.
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jpletcher1Author Commented:
I have found this info from several places in forums:

"unchecked"??? Do you mean, you went into products & classifications, and removed the check-mark from XP and 03 in there?

If so, that only stops your WSUS from synchronising *new* metadata/content; it takes no action whatsoever upon existing metadata/content.

To get cleanup to do anything useful, you must tightly manage your approvals/declines - this means that you don't leave anything in an unapproved status  - you also need to be tightly managing your superseded/expired etc.

If an update is at unapproved or approved status - it cannot/will not be cleaned up - to be cleaned up it must be declined.
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jpletcher1Author Commented:
Telling the server cleanup wizard to remove superseded updates only does so in the following instances:

The Server Cleanup Wizard does not do that. The SCW declines superseded updates, only if:
•The newest update is approved, and
•The superseded updates are Not Approved, and
•The superseded update has not been reported as Not Installed (i.e. Needed) by any computer in the previous 30 days.
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DonNetwork AdministratorCommented:
I find it way easier to just start from scratch on the new server! Select only the products and classifications you want/need.Then point all the clients to the new server(via GPO), wait for them to check in, then go and approve only the updates that are deemed as "needed". Now you can set up your auto approval rules.
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jpletcher1Author Commented:
Both solutions probably work.  One requires a lot of work before migrating and the other requires some work re-approving.  I'm going with the later as I know that will get me a clean setup.
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