Exporting Shared Calendar from MS Exchange 2003 to Outlook 365

I am trying to find a solution to Migrate a small office of 5 mailboxes from an SBS 2003 server's Exchange to Outlook 365.  I need a process to backup and restore all historical email data and to attempt to include shared calendars and contacts.  Right now we are using both POP email and Exchange.  A couple of years ago we decided to attempt to get rid of the SBS server completely as there are only 5 mailboxes, but we could not get around the shared calendar and ability to open up other users mailboxes if need be.  So we have both POP and Exchange accounts on everyone's local Outlook client to be able to use both.  Please provide a solution to migrating to Outlook 365 so that we can completely remove the old SBS server.
carilouAsked:
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Vasil Michev (MVP)Commented:
For just 5 mailboxes, I would export everything to a PST file and import in the newly created O365 accounts. Repeat the same process for any shared mailboxes as well.

You can also go for Cutover migration: https://technet.microsoft.com/en-us/library/jj874016(v=exchg.150).aspx
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carilouAuthor Commented:
I've tried this before and I cannot export a shared calendar to a pst
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Vasil Michev (MVP)Commented:
Of course you can. You just have to do it from the owner mailbox (or if it's hosted in a shared mailbox, configure the shared mailbox as additional account in Outlook and do the export).
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carilouAuthor Commented:
OK maybe I did not approach it the right way.  The shared calendar is in Public Folders on the Exchange server, which is on site and not hosted.  Everyone accesses this calendar from their local Outlook 2007.  Are you saying I can export it to a pst like I could export their inbox and subfolders?  The same exact process?  That is  where I am unclear...
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Vasil Michev (MVP)Commented:
The PF tree is visible in the Export wizard, not sure what problems you faced before.
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