Every company’s dream is to give its consumers the ability to jump from one of its products to another. And Microsoft is no different.
They allow users to seamlessly go from Outlook to Teams by integrating Teams add-in into Outlook.
However, it’s not as simple as it looks and requires a lot of work; therefore, prone to problems.
Usually, Teams integration to Outlook is pretty straightforward and happens automatically when you install Teams.
But in case you are having problems uniting Teams with Outlook, I’ve described all the tested fixes in this article. I’ve also explained what Microsoft Office version you need to integrate Teams with Outlook properly.
Why is Teams Add-in Missing from Outlook?
While it’s possible that you do not see an add-in in the Outlook toolbar because it is collapsed, most of the time, Outlook disables it as it clashes with third-party add-ins or the add-in has executed something that Outlook stopped working.
So, Outlook disables the add-in to prevent further crashes.
Here are the reasons why Teams add-in is missing from Outlook:
Using Old Office Version
You might be using an Office version that doesn’t support Teams integration with Outlook. You need to have Office Professional Pro or Microsoft 365.
To check what Office version you are running, open any Microsoft app like Word or Outlook and go to File > Office Account, and you’ll see your Office version under Product Information.
Add-in Must Support OAuth in Exchange Store
All the add-ins are stored in the Exchange store. The management putting out the add-in and the people using it need to be on the Exchange server with OAuth authentication.
Removed from Group
Add-in will stop showing up if you are removed from a group that the add-in was designated.
Sign in Requirements
You need to sign in to Teams using multi-factor authentication in order to unite Teams with Outlook.
What You Need to CombineTeams with Outlook
You need to use a recent version of Microsoft Office to include Teams add-in to Outlook. You’ll need to run Teams as an admin. It will allow the app to modify the registry. Also, try not to run Outlook with a high priority, which might interrupt COM add-ins.
Here are the prerequisites to unite teams with Outlook:
Software Version Requirements
To use add-ins in Outlook, you need a recent Office 365 or Exchange version. For using the Teams add-in, you must have at least Office 2013, Office 2016, Exchange 2013, and Exchange 2016. Also, keep the Teams app updated.
You should see the Teams option in the Outlook toolbar when you have the correct version. But if you don’t have the option, I’ve provided the solutions for that.
Install Teams as an admin
Adding the Teams add-in to Outlook requires modification of the registry files. So, without the admin privileges, you cannot change the registry, thus unable to include Teams add-in to Outlook.
Related guide on Microsoft Teams: How to Adjust Camera Brightness.
How to Fix Microsoft Teams not Integrating with Outlook?
Typically, you get the option to associate Teams with Outlook automatically when you install Teams.
But if you don’t see the Teams option in the Outlook toolbar, I’ve given every possible fix that will certainly solve this issue for good.
Here’s how to fix Teams not integrating with Outlook:
1. Reinstall Microsoft Teams
If the Teams app isn’t installed correctly or the files get corrupted, you’ll obviously be unable to include the Teams add-in to Outlook. And the first step should be to uninstall and reinstall Teams.
Here are the steps to reinstall Teams:
- Click the Search icon.
- Type Control Panel and run it.
- Select Uninstall a program under Programs.
- Choose Microsoft Teams and click Uninstall.
- Open your web browser.
- Go to the Microsoft Teams Download page.
- Choose your Teams version.
- Download the setup file and run it.
After these steps, the Teams launcher will download the central files and install the app.
Follow our new guide on Microsoft Teams Lock Files.
2. Run Teams as an Admin
It will allow Teams to alter the registry files so that the COM add-ins in Outlook can identify Teams adds-in.
Here’s how to run Microsoft Teams as an admin:
- Right-click on the Microsoft Teams icon and choose Properties.
- Go to the Compatibility tab.
- Put a checkmark on Run this program as an administrator.
- Apply the changes.
You don’t need to run Outlook as an admin. It’s better to just run it as usual.
3. Maintain Order When Launching Apps
This is a weird fix, but it has worked for some users. Running apps without any order should not affect how they behave, but it does.
Microsoft themselves suggested downloading, installing, and signing in to Teams first. Then Teams and restart Outlook. Maintain this order.
Restart both Teams and Outlook if you had to add the Teams add-in to Outlook manually.
4. Enable Teams Add-in
You need to open the add-ins list of your Outlook and check whether the Teams add-in is enabled or not.
Here are the steps to enable Teams add-in on Outlook:
- Run Outlook.
- Go to File > Options > Add-ins.
- Select COM Add-ins beside Manage and click Go.
- Make sure Microsoft Teams Meeting Add-in is checked and press OK.
Check out the easiest way to Fix Microsoft Teams Chat Messages Not Showing Up.
5. Manually Add Teams Add-in
In case you don’t have the Microsoft Teams Meeting Add-in, just go through the following steps.
Here’s how to manually add the Teams add-in to Outlook:
- Open Microsoft Teams.
- Click the 3 horizontal dots beside your profile and select Settings.
- Move to the General tab.
- Check Register Teams as the chat app for Office.
- Restart Teams.
- Restart the Outlook app on the desktop.
And you should be able to see the Teams add-in in the COM Add-Ins list of Outlook.
Related content you should read,how to Fix Outlook Not Connecting to Server Error.
6. Enable Add-in from Teams Admin Center
Teams option wouldn’t show up in the Outlook toolbar if someone disabled the Outlook add-in from the Teams admin center.
Here’s the process to enable Outlook add-in from the Teams admin center:
- Open your browser and go to Microsoft Teams Admin Center. Remember, you must be an admin to view the page.
- Select Meeting policies under Meetings.
- Turn on Allow the Outlook add-in.
7. Clear Microsoft Teams Cache Files
Sometimes cache data can contain corrupted files, which may result in the problem you are facing. Clear the cache file and check whether the problem is fixed or not.
Here’s the process to clear the Teams cache files:
- Close Microsoft Teams and make sure it’s not running in the background.
- Right-click on the Windows icon and select Run.
- Type in %appdata%/Microsoft/Teams to open the Teams cache folder.
- Select all the files and folders and Delete them. Skip the files and folders that can’t be deleted.
8. Repair Office
Repairing Microsoft Office can sometimes solve the issue at hand.
Here’s how to repair Microsoft Office:
- Run Control Panel.
- Go to Programs > Programs and Features.
- Select Microsoft Office Professional Plus 2016 or whichever version you are using and click Change.
- Choose Quick Repair, and if the problem continues, select Online Repair.
9. Stop Teams from Running in the Background
If Teams runs in the background, it might prevent Outlook from adding the Teams add-in.
Here’s how to stop Teams from running in the background:
- Open Microsoft Teams.
- Click the 3 horizontal dots beside your profile and select Settings.
- Go to the General tab.
- Uncheck On close, keep the application running.
After these steps, Microsoft Teams will stop running as soon as you close it.
10. Re-register Teams DLL
You might be having this issue because there was a problem registering the Teams add-in, and you need to re-register. But first, check if the add-in is installed correctly or not.
Here’s how to check the Teams add-in install logs:
- Copy %LocalAppData%\Microsoft\TeamsMeetingAddin.
- Click the Search icon and paste it, and hit enter.
- Open meeting-addin-install-logs.txt.
- Scroll all the way down and see whether the meeting add-in is installed or not.
If the log says the meeting add-in is now installed, everything is fine, and no need to re-register. But if it doesn’t, you’ll need to re-register.
Here are the steps to re-register Teams DLL:
- Copy the whole thing in the following line:
C:\WINDOWS\system32\regsvr32.exe /n /i:user “C:\Users\[YourUserName]\AppData\Local\Microsoft\TeamsMeetingAddin\[YourAddinVersion]\x64\Microsoft.Teams.AddinLoader.dll”
- Put your username between the square brackets and remove the brackets. For me, it is:
C:\WINDOWS\system32\regsvr32.exe /n /i:user “C:\Users\HP\AppData\Local\Microsoft\TeamsMeetingAddin\[YourAddinVersion]\x64\Microsoft.Teams.AddinLoader.dll”
- Put your add-in version between the square brackets and remove the brackets.
-To get the add-in version
- Copy %LocalAppData%\Microsoft\TeamsMeetingAddin.
- Click the Search icon and paste it, and hit enter.
The name of the folder is the add-in version. 
After completing the command line, it should look something like this,
C:\WINDOWS\system32\regsvr32.exe /n /i:user “C:\Users\HP\AppData\Local\Microsoft\TeamsMeetingAddin\1.0.22147.1\x64\Microsoft.Teams.AddinLoader.dll”
- Copy your command line.
- Click the Search icon and paste the command, and hit enter.
After going through the steps, you’ll successfully register Teams meeting add-in.
FAQs
How do I enable Microsoft Teams add in Outlook?
To enable Microsoft Teams add-in, launch Outlook, go to File > Options > Add-ins > COM Add-ins and select Go. Check Microsoft Teams Meeting Add-in for Microsoft Office.
Why is my Outlook not connecting to Microsoft Teams?
Outlook is not connecting to Microsoft Teams because the Teams add-in is disabled. To enable Microsoft Teams add-in, launch Outlook, go to File > Options > Add-ins > COM Add-ins and select Go. Check Microsoft Teams Meeting Add-in and click OK.
How do I add a team meeting to an existing Outlook invite?
To add Teams meeting to an Outlook invite, go to Calendar and double-click the invite. Choose Teams Meeting from the toolbar and select Send Update.
Final Thought
Microsoft allows us a smooth transition from Outlook to Teams. We can move our emails to Teams as chats and add Outlook calendars and meetings to Teams with just a click.
But not everything goes according to plan, and sometimes you have trouble merging Outlook with Teams which you won’t have to face after today.
Here, I’ve explained all the fixes, whether small or big, like checking a few things or changing a few settings.
Let me know if you have any questions regarding Outlook or other apps. See you in the comment section.
