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It’s just strange that this is happening to everyone regardless of Outlook version (2016 and 2019) or Windows version (Windows 7 and Windows 10). I just went on the apps page and disabled "allow users to install 3rd party apps," while keeping the Microsoft app installs enabled. Compliance reached out to me and said users should only be able to freely install Microsoft owned apps on o365. This applies to teams and outlook and office apps.

How do I disable outlook add-ins

Oftentimes in the disabled add-in box is Adobe Send & Track or Adobe PDF Maker, but also sometimes Salesforce for Outlook, which we need to continue to have enabled. We decided to discontinue the outlook plugin service. I would like to know how to disable/remove the plugin for users who already have it installed. To block add-ins that are not managed by this policy setting, you must also configure the Block all unmanaged add-ins policy setting. Yes, I’ve been disabling them from the Outlook menu, but a select few keep re-enabling themselves.

Outlook: Disable Outlook COM add-ins

In these cases, the cause of the crash or the loading failure needs to be fixed together with the add-in owner. I’m back in the office now after a week and this is still going on. It’s interesting that O365 and CTR users seems to be effected because the majority of the affected users in our office are Outlook 2016 or 2019, not O365 (though I think 2019 is CTR). To disable certain add-in, locate to the add-in under Addins, in the right panel, there is a subkey named LoadBehavior, set the value to ‘2’ to disable it. Exploring this admin page, i see that I'm able to make policies for each resolve Outlook not sending emails fast o365 app. Have questions or feedback about Office VBA or this documentation?

Support and feedback

• Block all unmanaged add-ins, and list of managed add-ins.
• I’ve changed the load behaviour from the regitry for some users and that seems to have stopped them from loading.
• I’d rather not go through every registy in the company to fix this issue.
• Now when I open teams i can clearly see that 3rd party apps need to be requested but ms apps can be installed without issue.
• We decided to discontinue the outlook plugin service.
• To block add-ins that are not managed by this policy setting, you must also configure the Block all unmanaged add-ins policy setting.
• While most add-ins will not be disabled by the add-in disabling feature, you don't want your add-in to be disabled consistently.
• Well after disabling that setting, now I'm testing further and I noticed that if I open PowerPoint and click add-ins, I'm still freely able to install anything.
• I’m back in the office now after a week and this is still going on.

I was under the impression that this "let users access third party apps in your tenant" was all encompassing and would disable all 3rd party apps / add-ins for all o365 apps. Now when I open teams i can clearly see that 3rd party apps need to be requested but ms apps can be installed without issue. The user has control over which add-ins run on their computer. Beginning with Office 2013, system administrators can configure an enhanced level of control for add-ins by using group policy.

Preventing add-ins from being disabled

I’ve got a problem with Outlook for users in the office that FixTechGuide mailbox repair steps addins keep crashing Outlook. I disable all addins on the users machines but the addins keep re-enabling themselves. If you re-enable an add-in that caused a performance problem at one time, users may experience performance problems in the future in the Office program for which the add-in is loaded. Unfortunately I don’t have an answer for this but I’m +1’ing it for needing a resolution. We’re on the Monthly build of Office 365 (click-to-run). This started happening a week or so ago, but it’s becoming increasingly annoying.

Support for keeping add-ins enabled

Please see Office VBA support and feedback for guidance about the ways you can receive support and provide feedback. To disable all the add-ins, just use Group Policy Outlook OST vs PST repair to delete or rename the Addins to OldAddins.