Exchange 2016 Public Folders

Try to login with administrator mailbox in outlook or configure a profile.

Check whether administrator is member of "Public Folder Management" RBAC role.

Check permissions for folder visible.

Change the outlook view to month view.

Verify the same using OWA if you are able to see the items to isolate if the issue is with OWA or outlook.

Thanks Saif. However, I'm still not able to view the items in this PF. I mail-enabled it, and now it shows an additional item in the count, but can't access the data even as owner. Not visible either in OWA

It sounds like they might be accessing public stores on different servers and the replication is failing.  

http://blogs.technet.com/b/exchange/archive/2006/01/17/417611.aspx

Do you have a primary hierarchy and secondary hierarchy PF mailbox?

My Exchange 2016 PF environment has one primary mailbox Database and and 4 secondaries databases (autoSplit_xxxxx) which are part of the DAG. However, on two of the 4 secondaries DB under 'mailbox usage' when I select, it says 'The user hasn't logged on to mailbox autoSplit_xxxx...so there is no data to return..."

BTW- some PF do show the calendar data just fine.

while running Get-PublicFolderMailboxDiagnostics -ident PFMailbox under syncInfo: IsFullSyncCompleted: False.   Other PFMailboxes says 'True'.  Could this be the issue? How can I get it to sync?

The Update-PublicFolderMailbox -id nameOfPFMailbox  changed the syncInfo from  IsFullySyncCompleted to True. I'm still unable to see the data in some of the PF folders in Outlook or OWA. I'll wait another 24 hours.