How do I stop the New Teams from opening after Outlook opens? Disabling the Teams Outlook plugin does not help

None of your recommended fixes are viable solutions. Disabling the plugin does not stop Outlook from opening. Forcing Teams to close or taking it out of startup should not be considered a fix - especially if you need to use Teams constantly throughout the day. I have also tried uninstalling Teams with power shell and re-installing it with the off-line installer. I'm in support and I have multiple tickets regarding this issue and no fix.

Please confirm that this issue is caused by a recent update and let me know when I can expect a resolution.

The issue is not limited to Outlook. Teams pops-open with all Office applications. (I have Office Professional Plus 2019)

I want the Teams to keep running in system tray to provide notifications but it should not pop open in front when I open an Office application or an Office file. I have seen this solution to stop Auto-Start or disable Teams in startup suggested at many places on the Internet. This is really not a solution to the problem. We want Teams to load and keep running. We only don't want Teams widow to pop open.

Hello,

My name is EngineTyme, an Independent Advisor and a Microsoft user like you and I would be glad to help you.

Let’s troubleshoot this issue to prevent Microsoft Teams from opening every time you launch Outlook. Here are some steps you can try:

1. Disable Teams Add-in in Outlook again following the steps listed below: Open Outlook. Click on the File tab. Select Options. Go to Add-ins. In the Manage box, choose COM Add-ins, and then click Go. Clear the check box next to Microsoft Teams Meeting Add-in for Microsoft Office. Click OK. Close both Outlook and Teams, and then reboot your device.
2. Turn Off Teams Auto-Start: Locate the purple Microsoft Teams icon in your notification area or system tray (usually near the clock). Right-click the icon and select Settings. Under the General section, uncheck the box next to “Auto-start application”. You can also right-click the icon again and select “Quit” to ensure Teams doesn’t start automatically.
3. Check Task Manager Startup Settings: Open Task Manager (you can press Ctrl + Shift + Esc or right-click the taskbar and choose Task Manager). Go to the Startup tab. Look for Microsoft Teams and disable its startup process if it’s enabled.

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Please let me know if you have any questions or concern.

Best regards, EngineTyme.

Method 1 is not a solution: that basically removes Teams from Outlook. That's not what Kady Q011 was asking.

Method 2 and 3 are not solutions. Those stop Teams from launching at startup. That's not what Kady Q011 was asking.

I can confirm this is happening to several of our users in our office.