How to troubleshoot Microsoft Outlook setup | Microsoft

This session will help you understand Outlook protocols, known issues, troubleshooting tips & tricks for performance, hang, crash, and tools used for determining Outlook issues.

Timestamps
0:00 Intro
2:43 Outlook overview
4:40 Managing Outlook
7:20 Common issues
8:40 Preliminary checks/isolation
12:12 Troubleshooting tips
12:21 Connectivity issues
16:52 Sync issues
20:30 Calendaring issues
23:23 Search issues
28:06 Shared Mailbox/Public folder sync
31:25 Contact/Address book
34:14 Troubleshooting performance issues
38:24 Credential prompt
42:15 DLP Policy & tips
45:08 Installation & feature issues
48:45 Useful tools
48:55 SARA diagnostics

References:
Managing Office 365 Updates

Delete a message stuck in Outbox:

Using Meeting Analyzer tool

Troubleshooting Outlook search

Add-in registry location