Migrating Exchange 2010 Public folders to O365 - Migrate just 2 to test?

Exchange Server 2010, SP3 RU19
New Office 365 Tenant

Reading this article I've worked my way to the bottom and it seems like its an All or nothing Migration?

All of my Public Folders are pretty much Empty or can be. We use 1/2 of them as Mail enabled and incoming mail gets processed by some EWS Scripting, once the email is processed it is moved to another Non-mail enabled Public folder.

So I really just need to test my EWS Script on the O365 Public Folder.  In the Link above it seemed like you cant have Public Folder on both O365 and On-Premise? I cant remove my On-Premise Public folders until I know my Scripts work on the O365 Public folder.

Scott TownsendIT DirectorAsked:
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Vasil Michev (MVP)Commented:
Yes, all the migration methods for PFs are "all or nothing". Excluding the recently announced PF to Office 365 Groups migration: https://technet.microsoft.com/en-us/library/mt843872(v=exchg.160).aspx

For your case, you can simply provision a PF or two in O365, test the script you have, and if it works fine remove the PFs/trigger the migration.

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Sandeep KumarAssociate ConsultantCommented:
Scott TownsendIT DirectorAuthor Commented:
Are there any Issues with Having PF in Exchange Online and on the On-Premise Server at the same time?
Since I only have about 10 folders and they only contain maybe 100 Backup Items I was thinking to just re-create the folder structure on the EOL Server and then once I'm ready and tested all of my Code. I can Change the email address of the Mail-Enabled folders to the real address vs the test address and then just delete the FPs on the On-Premise Server...

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