Outlook 2016 hangs on updating folders
Start low - and you can increase it as you validate it if you need too.
This article describes some of the most common reasons that cause Outlook to become unstable, crash, hang or freeze.
The version of Outlook that you are using doesn’t seem to matter and other applications may also be affected.
Update: Microsoft has rereleased update KB3097877 and it no longer crashes Outlook.
Microsoft is aware of this issue and provides a tool to fix it – Inbox Repair tool (scanpst).
Follow the steps listed in that Microsoft Knowledge Base article to run Scan PST. Important: In many cases, Scan PST requires more than one pass to fix a corruption.