Two error messages in Outlook (with CRM for Outlook 2015 0.1 / Outlook 2013)

Hello all:

I am having two recurring but not persistent errors with a few users when using Set Regarding in Outlook:

• “The selected item cannot be tracked in Microsoft Dynamics CRM.Item Name=(the name)
  • This one will appear when first running Outlook
• "You cannot add items to an inactive queue.  Select another queue and try again
  • In one instance, this is an email to be tracked via Set Regarding to a Case
  • The Case is in an active queue
  • So is the associated Account and Contact

Any ideas on what I am missing on this?