Outlook keeps disabling the Teams Plug-in

Question

Outlook keeps disabling the Teams Plug-in

Steve R 31

Been using Office 365 for about a year now and Outlook's favorite dirty trick is to declare the Teams plug in unworthy and disable it when Outlook loads. Makes it a real PITA to schedule a Teams meeting. I'm open to suggestions. Thanks!

Glover, Nicole 0 Reputation points

2026-01-08T21:29:10.0166667+00:00

I have the same issue in 2025 and now in 2026. When is Microsoft going to fix this add-in issue. Seems like every time an update is pushed it corrupts the Team's add-in in Outlook. All the blow fixes do not work at all.

9 answers

Your answer

Glover, Nicole 0 Reputation points

2026-01-08T21:29:10.0166667+00:00

I have the same issue in 2025 and now in 2026. When is Microsoft going to fix this add-in issue. Seems like every time an update is pushed it corrupts the Team's add-in in Outlook. All the blow fixes do not work at all.

Answer 1

JimmyYang-MSFT 58,756 Moderator

Hi @Steve R ，
Could you find the Teams meeting Add-in in Outlook Com Add-ins?

If the add-in still does not show, use the following steps to verify the registry settings.

Launch RegEdit.exe
Navigate to HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins
Verify TeamsAddin.FastConnect exists.
Within TeamsAddin.FastConnect, verify LoadBehavior exists and is set to 3.
If LoadBehavior has a value other than 3, change it to 3 and restart Outlook.
For more details about how to troubleshoot this issue, you can refer to:
https://learn.microsoft.com/en-us/microsoftteams/teams-add-in-for-outlook#troubleshooting

If the add-in has been disabled, you can try to follow these steps to prevent it:

Open Run, type “regedit” to open the registry editor.
Go to “HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Resiliency” (16.0 for Outlook 2016)
Delete the DisabledItem if there is.

If the response is helpful, please click "Accept Answer" and upvote it.

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Steve R 31 Reputation points

2021-03-01T11:32:20.217+00:00

The add in is always there, but Outlook marks it as disabled. I did navigate to the key above and there was a key labeled DisabledItems but it currently has nothing listed.

Within TeamsAddin.FastConnect, there was nothing labeled LoadBehavior so I created it and set a value of 3.

Thanks for your advice. I will continue to monitor this.
JimmyYang-MSFT 58,756 Reputation points Moderator

2021-03-04T10:29:05.88+00:00

@Steve R

You're welcome. If you have any update, please feel free to contact with us!
JimmyYang-MSFT 58,756 Reputation points Moderator

2021-03-09T10:19:16.233+00:00

@Steve R

Any update?
sjropiak 1 Reputation point

2021-03-09T10:23:16.55+00:00

So far, the issue hasn't returned, so I think it's safe to say you have solved it.
sjropiak 1 Reputation point

2021-03-11T11:56:48.707+00:00

Well, it reared it's ugly head again. Last night, Outlook crashed as I was closing it and this morning Outlook disabled the Teams plug in when I opened it. Does Microsoft have any plans on fixing this? This plagues multiple people in our organization.
Boyong Shen 6 Reputation points

2021-06-29T16:56:26.483+00:00

Thanks for sharing it!
Kakulde, Nitinkumar 1 Reputation point

2022-08-24T14:26:51.347+00:00

this worked for me , I am able to get teams meetings in outlook now. thanks
Francois Theron 0 Reputation points

2023-07-26T09:16:13.9966667+00:00
If the add-in has been disabled, you can try to follow these steps to prevent it:

Open Run, type “regedit” to open the registry editor.

Go to “HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Resiliency” (16.0 for Outlook 2016)

Delete the DisabledItem if there is.

Worked perfectly thank you!
Idini, Marco 0 Reputation points

2023-12-01T18:06:34.1266667+00:00

This is an awesome solution. It looks permanently fixed, fingers crossed.

I am monitoring it.
Graf, Marcel 10 Reputation points

2024-12-19T08:12:54.7433333+00:00

Deleting the DisabledItem worked perfectly for me. Thanks for the hint.

Answer 2

Micah Amstutz 51

I had a user running into this issue. I tried all the recommended fixes and they would either not work, or would only temporarily work (less than a day). In Outlook, I discovered that it was listed in "Slow and Disabled COM Add-ins" found in File > Info. The average delay in my case was 0.66 seconds. I set it to always enable this add-in and that fixed the issue for me. Hopefully this helps someone else. It took me quite some time to find it.

A, Mal 6 Reputation points

2022-07-25T14:20:23.077+00:00

This worked great. It was taking me forever to locate the bug. Thank you, and good catch.
BradCMI 146 Reputation points

2023-02-17T17:39:13.5533333+00:00

Thanks. This was the one that worked for a user of mine. Forgot about the File > Info section.
Micah Amstutz 51 Reputation points

2023-02-17T18:10:34.63+00:00

Glad that worked for you, Brad!
Dino Saccani 0 Reputation points

2023-05-22T15:19:39.76+00:00

Bravo! That fixed it. Thank you!
Renato Pejon 20 Reputation points

2023-07-20T15:05:37.8666667+00:00

Thank you!

Problem fixed
Angel Rodriguez 0 Reputation points

2025-09-10T19:59:13.9633333+00:00

Where do you folks set the addin to never disable? I don't see that option.

Answer 3

PauloKinopk 56

I had the same issue with a user today.

These steps worked for me:

Close Outlook and Teams
Uninstall Microsoft Teams and Teams Machine-Wide Installer
Under %localappdata%\Microsoft delete the folders: SquirrelTemp, Teams, TeamsMeetingAddin and TeamsPresenceAddin
Download and re-install Microsoft Teams

Jay 1 Reputation point

2022-01-19T10:55:15.243+00:00

Finally find a solution that works for me, thanks!
Jay Liang 1 Reputation point

2022-03-05T06:50:15.687+00:00

Good one. Fixed our issue too. Thanks!
Denas Marcinkus 1 Reputation point

2022-06-06T10:18:43.857+00:00

This worked, thank you!
Karolyn Hobbs- Valentin 0 Reputation points

2023-02-21T18:05:34.7633333+00:00

worked!!!! thank you

Answer 4

Uli 11

I'm seeing multiple users with this issue - we are finding the fixes above aren't permanent. Does anyone know if there is a way to set the "always enable this add-in" perm when deploying the add-in via Intune? We're hoping to make this a non-issue for our users.

Micah Amstutz 51 Reputation points

2023-05-22T17:10:10.5566667+00:00

Did my post above not solve the issue? Was there no option to always allow?

Answer 5

Sahil Aggarwal 1

You may also want to check the "Slow and Disabled Add-in" in the File menu and take corrective action (by stop monitoring).
In my case, Teams add-in slowed Outlook hence it was disabled.

ATW 0 Reputation points

2023-12-07T07:31:29.6033333+00:00
I'm facing almost the same issue, but instead of being disabled, the plugin simply is not present in Outlook after each reboot.

The LoadBehavior Registry-Key is set to 3 and there are no entries for disabled AddIns under the Resiliency Key.

Re-Installing does indeed help but only temporary, after a rebbot, the Issue is back.

My current workaround is to register the TeamsAddIn from Autostart before Teams and Outlook have started, by executing this command (32-Bit):

%SystemRoot%\SysWOW64\regsvr32.exe /s /n /i:user %LocalAppData%\Microsoft\TeamsMeetingAddin\1.23.33413\x86\Microsoft.Teams.AddinLoader.dll

If Outlook and Teams had been running, close both applications and start Outlook first, then Teams to make the change active.

Of course this isn't perfect as You'll have to check your TeamsMeetingAddin Version (as it will be silently updated when there's a new version) to make sure the most recent version is loaded.

P.S.: For 64-Bit the command is slightly different:

%SystemRoot%\System32\regsvr32.exe /s /n /i:user %LocalAppData%\Microsoft\TeamsMeetingAddin\1.23.33413\x64\Microsoft.Teams.AddinLoader.dll

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Outlook keeps disabling the Teams Plug-in

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