This policy setting controls Outlook's "fast shutdown" behavior for add-ins.
If you enable this policy setting, the BeginShutdown and OnDisconnection events should always be called for all add-ins.
If you disable or do not configure this policy setting, all Outlook addins should always use the Addin Fast Shutdown behavior and not have the BeginShutdown and OnDisconnection events called.
| Registry Hive | HKEY_CURRENT_USER |
| Registry Path | software\policies\microsoft\office\16.0\outlook\options\shutdown |
| Value Name | addinfastshutdownbehavior |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |