Slow and Disabled modus

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In some circumstances Outlook decides to disable an add-in, because it detects a delay while starting or closing Outlook.
We do a cleanup of the temporary files on interval (and startup).

If there are a lot of files (or very big files) to cleanup it can take a few seconds to complete. Go to your Outlook and then click info, there you will see the option “Slow and Disabled COM Add-ins”. click it and then search for “DragDrop for Outlook” and then click “always enable this add-in” (Marked in red). After that restart Outlook and you are good to go.

You can force this by setting this in the registry values.

Download the registry files:
ForceDoNotDisable_DragDrop_2016_2019.reg
ForceDoNotDisable_DragDrop_2013.reg

Or set them manually:
16.0 is the office version for Office 2016/2019/365, use 15.0 for Office 2013

Windows Registry Editor Version 5.00

 [HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\16.0\Outlook\Resiliency\AddinList]
 "HUSS Outlook-drag-drop-to-browser"=dword:00000001
 "DragDrop"=dword:00000001
[HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\Outlook\Addins\HUSS Outlook-drag-drop-to-browser]
 "LoadBehavior"=dword:00000003
 [HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\Outlook\Addins\DragDrop]
 "LoadBehavior"=dword:00000003
[-HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook\Resiliency\DisabledItems]
[HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook\Resiliency\DisabledItems]
[-HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook\Resiliency\CrashingAddinList]
[HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook\Resiliency\CrashingAddinList]
[HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook\Resiliency\DoNotDisableAddinList]
 "HUSS Outlook-drag-drop-to-browser"=dword:00000001
 "DragDrop"=dword:00000001
[HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook\Resiliency\NotificationReminderAddinData] 
"DragDrop\dtype"=dword:00000000
[HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook\Resiliency\NotificationReminderAddinData] 
"DragDrop"=dword:967a844d

Read more about this behavior on this blog: https://blogs.msdn.microsoft.com/emeamsgdev/2017/08/02/outlooks-slow-add-ins-resiliency-logic-and-how-to-always-enable-slow-add-ins/

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