Microsoft Outlook detected an issue with an add-in and disabled it

Suthers

Microsoft Outlook 365, desktop version, regularly disables Bitdefencer claiming if Microsoft Outlook detected an issue with an add-in and disabled it detected an issue it. i then 'allow' Bitdefender and the program works. but it will disable it again next week. how can this be fixed?

Alexandru_BD

Hello,

I think this can happen and typically stems from Outlook's built-in performance monitoring, which disables any add-in it believes is causing instability or performance degradation. So, Outlook monitors all add-ins and automatically disables any that may cause it to crash, take too long to load, or are deemed to significantly degrade performance. In your case, the Bitdefender Antispam module is being flagged repeatedly even after you re-enable it manually. This creates a cycle of disabling and re-enabling. You can prevent Outlook from disabling the add-in by forcing it to remain enabled via the Windows Registry. However, be advised that editing the registry incorrectly can cause system instability. You should back up the registry before making any changes.

If you feel comfortable doing this, try the following:

Press Win + R, type regedit, and press Enter. Navigate to: HKEY_CURRENT_USER\Software\Microsoft\Office<version>\Outlook\Resiliency\DisabledAddins

Replace <version> with 16.0 for Office 2016/2019/365.

If Bitdefender Antispam appears in this key, delete it. Then go to:

HKEY_CURRENT_USER\Software\Microsoft\Office<version>\Outlook\Resiliency\DoNotDisableAddinList

If DoNotDisableAddinList does not exist, create it. Inside this key, create a new DWORD (32-bit) value:

Name: {Bitdefender Add-in GUID}
The typical GUID is: {C2204F70-729F-4293-AA4A-6BFB5F1F7D78} (You may need to confirm this by checking Outlook’s COM add-ins).

Value: 1

This tells Outlook to always allow the Bitdefender add-in, regardless of performance assessments.

If Outlook still disables it despite registry changes, consider using Bitdefender Antispam without the add-in. Try whitelisting Bitdefender-related plugins in Outlook Trust Center. The path should look something like this:

File → Options → Add-ins → Manage COM Add-ins → Go. There, locate Bitdefender Antispam and ensure it's checked and enabled.

If nothing works, or if you don't feel comfortable trying these steps, head to the link below to get in touch with Bitdefender Support for more technical assistance:

https://www.bitdefender.com/consumer/support/help/

State your contact reason / choose request category, then choose from the available contact channels, chat, phone and email/ticket. Chat would be the fastest way to reach them.

Let us know how it goes.

Regards