Decommission Exchange 2010 in Exchange 2013 environment

I have migrated all user mailboxes and other Exchange services from 2010 to 2013 and am ready to uninstall Exchange 2010.

Public folders that were on the 2010 server are no longer used and all public folders (except Internet Newsgroups) have been deleted.  There is currently NOT a public folder database on 2013, nor does there need to be.  I understand and am comfortable with removing the 2010 Public Folder database in ADSIEDIT, similar to a Exchange 2003 to 2007/2010 migration.

When I go through the steps to make sure that I can delete the Public Folder Database, it shows my 2010 mailbox database, as well as my Exchange 2013 mailbox database using the PF Database on 2010 as the "Default Public Folder Database".

The question is, if I remove it via ADSIEDIT, will I be causing any problems with my 2013 Mailbox Database?  I don't necessarily care about the 2010 Mailbox Database, as that's going to be removed in preparation to uninstall Exchange 2010.

Robert
tnisupportAsked:
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Simon Butler (Sembee)ConsultantCommented:
In ADSIEDIT, for each database on the Exchange 2013 server, change the default public folder value to null - so choose the option to clear the entry. Then restart the information store.
That will drop the connection between the two servers.

You can then get rid of the public folder.

If you don't do that then you will end up with an orphaned object in your database configuration.

Simon.
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tnisupportAuthor Commented:
Is there anything else the 2013 server would be referencing the 2010 PF Database for?
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Simon Butler (Sembee)ConsultantCommented:
There is nothing that Exchange 2013 needs a public folder database for.
Public Folders are not used for anything other than data storage. There is no OAB distribution, free/busy etc.

You can run completely without Public Folders.
If you have in doubt, follow the instructions on TechNet for removing the last legacy public folder database.  

Simon.
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