Assignment Date Bulk Edit and Calendar Syllabus Reminders

In reference to the assignment bulk edit for due dates. If you bulk edit due dates for assignments/discussions and save as stated in this release video,  does this also change the reminders...

safari unauthorized syllabus download

Is anyone else seeing an issue with safari not allowing students to download the syllabus and giving them an error message? 

Invitation Link Expiring

Does anyone know if course invites expire with a certain amount of days? 

What are some collaboration tools that can increase student engagement?

Looking for ways to increase student engagement and hoping some collaboration tools can help. If anyone has ideas to share, I would love any feedback.