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i developed an addin for outlook 365 with c# .net45 vsto. Users complain that outlook disables the plugin because it slows down its launch. The plugin at outlook startup does nothing, not even in the ribbon load. Reading the Microsoft documentation https://docs.microsoft.com/en-us/office/vba/outlook/concepts/getting-started/support-for-keeping-add-ins-enabled to avoid disabling the plugin you need to create two registry keys below

HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Office\16.0\Outlook\Resiliency\AddinList --> key "<Prog-ID of Addin>" string value "1"
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook\Resiliency\DoNotDisableAddinList --> key "<Prog-ID of Addin>" dword_32bit value 1

I tried to create them but Outlook keeps disabling addins. Is there any way to prevent outlook from disabling addins?

Thanks

What about the bullet list under System administrator control over add-ins? Only two of them are relevant to startup. - nilsK
hi @nilsK, i have edited the question - renzo