Fix "User Accounts in Outlook and Teams Do Not Match"

"The user accounts in Outlook and Teams do not match. Please make sure you are signed in to both applications with the same user name and privileges." You see it when you click New Teams Meeting in Outlook and the Teams Meeting add-in cannot match the account in Outlook with the one in Teams. The meeting does not get a Teams link, and the invite goes out without one.

The fix depends on which Teams you have. Most PCs now run the new Teams, and the old trick of editing settings.json only applies to classic Teams, which Microsoft retired in 2025.

Quick answer

Make sure Outlook and Teams are signed in with exactly the same work account, then fully quit both and reopen Teams first, then Outlook. If it still fails, check that the Microsoft Teams Meeting Add-in is enabled under File > Options > Add-ins, reset Teams from Settings > Apps > Installed apps > Microsoft Teams > Advanced options > Reset, and restart.

Why the accounts do not match

• Teams is signed in with a different account, often a personal or a guest account in another organization.
• Your email address or UPN was changed (for example after a name change or a domain migration) and one app still has the old one cached.
• Outlook has more than one mailbox, and the default account is not the one Teams uses.
• Both classic and new Teams are installed, and Outlook is loading the old add-in.

Fix 1: Sign in to both apps with the same account

1. In Teams, click your profile picture and check the account and organization shown.
2. In Outlook, go to File > Office Account and check the user listed under User Information.
3. If they differ, sign out of the wrong one and sign in with your work account.
4. Quit both apps completely (right-click the Teams icon in the system tray and choose Quit), open Teams, wait until it has loaded, then open Outlook.

Fix 2: Make sure the Teams Meeting add-in is enabled

1. In Outlook, go to File > Options > Add-ins.
2. At the bottom, choose COM Add-ins and click Go.
3. Tick Microsoft Teams Meeting Add-in for Microsoft Office and click OK.
4. If it is listed under Disabled Items, enable it from there and restart Outlook.

If Outlook keeps turning it off, set it to always load. In regedit, go to HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins\TeamsAddin.FastConnect and set LoadBehavior to 3.

Fix 3: Reset the new Teams app

1. Quit Teams and Outlook.
2. Open Settings > Apps > Installed apps, find Microsoft Teams, click the three dots and choose Advanced options.
3. Click Reset. This clears the Teams cache and sign-in data.
4. Open Teams, sign in again, then open Outlook.

Fix 4: Clear old cached accounts

If the address was changed, Windows may still hold the old one.

• Open Settings > Accounts > Email & accounts and remove accounts you no longer use.
• Open Credential Manager > Windows Credentials and remove entries for MicrosoftOffice16 and Teams. Sign in again when the apps ask.
• If sign-in itself throws errors, see fix the Trusted Platform Module has malfunctioned error.

Fix 5: Still on classic Teams?

On an old PC that still has classic Teams, the original workaround was to edit %APPDATA%\Microsoft\Teams\settings.json, change every meetingAddinEnableTeamsAccountComparison value from true to false, and set the file to read-only.

That only hides the check, and classic Teams no longer gets updates. The real fix is to uninstall classic Teams and install the new Teams, which also installs the new meeting add-in.

For other Outlook problems, such as the Disconnected status, see Outlook 365 disconnected fixes.

Frequently asked questions

What does "the user accounts in Outlook and Teams do not match" mean?

The Teams Meeting add-in in Outlook checks that Outlook and Teams are signed in with the same account. When they differ, it refuses to create a Teams meeting and shows this error.

Does editing settings.json still fix it?

Only on classic Teams, which Microsoft has retired. New Teams does not use that file. Sign in to both apps with the same account, enable the add-in and reset Teams instead.

Where is the Teams Meeting add-in in Outlook?

File, Options, Add-ins, then COM Add-ins and Go. It is called Microsoft Teams Meeting Add-in for Microsoft Office.

Will resetting Teams delete my chats?

No. Chats, files and meetings are stored in Microsoft 365, not on your PC. A reset only clears the local cache and sign-in, so you sign in again afterwards.

The Teams Meeting button is missing completely. What now?

Enable the add-in under COM Add-ins and set LoadBehavior to 3 for TeamsAddin.FastConnect. If it is still missing, reinstall the new Teams, which installs the add-in again.