Updated, yet continue to receive message of outdated version

The behavior described indicates issues with how the meeting link is being opened and which Teams client or session is being used, not with Windows or Outlook itself.

For Windows devices:

1. Ensure the correct Teams app is used
   • Use the work/school (business) version of Microsoft Teams, not the personal version. If both are installed or both accounts are signed in, the wrong client may be trying to open the link and reporting it as “outdated.”
2. Clear the Teams cache and restart
   • Fully quit Teams (right‑click the Teams icon in the taskbar → Quit).
   • Clear the Teams cache as described in the guidance for similar meeting‑join issues:
     • For Windows: either reset the app from Apps → Installed apps → Microsoft Teams → Advanced options → Reset, or delete the cache folder under %userprofile%\appdata\local\Packages\MSTeams_8wekyb3d8bbwe\LocalCache\Microsoft\MSTeams and then restart Teams.
   • After clearing the cache, sign back in with the account that received the meeting invite and try the link again.
3. Try joining from a browser session
   • Copy the meeting link from the email.
   • Open a private/incognito browser window.
   • Paste the link and, when prompted, sign in with the same work/school account that should attend the meeting.
   • This helps bypass any stale desktop client state that might be causing the “outdated” message.
4. Check if the meeting is hosted by an external organization
   • If the organizer is in another company/tenant, their meeting policies or link configuration may restrict who can join or which client can be used. In that case, the organizer may need to confirm that external participants are allowed and that the link is not restricted to their own organization only.

For iPhone:

• The message “Session Error! Oh Sorry, This session is only Available on Android and Windows Devices” is not standard for normal Teams meetings. It usually indicates that the link is for a specific type of session or web experience that only supports Android and Windows, or that the organizer’s system is redirecting to a platform‑limited experience.
• In that case, join the meeting from a supported device (Windows or Android) using the Teams app or a supported browser, or ask the organizer to confirm that the meeting is a standard Microsoft Teams meeting that supports iOS clients.

If, after clearing cache and using the correct Teams client, the same “outdated” message appears only for meetings from a particular external partner, the organizer’s IT admin may need to review their Teams/meeting configuration for external attendees.

References:

• When I try to open Teams meetings from a link in my Google Calendar, the meeting never loads. - Microsoft Q&A
• Unable to access teams meetings - app just hangs when joining meeting - Microsoft Q&A

Dear @Michael Fisher,

Good day, and I appreciate the clear explanation of your concern. From my research, the issue where Microsoft Teams continues to show an “outdated version” prompt even after updating is a very common problem on Windows 11. In many cases, although Teams appears to be updated, an older version remains installed in the background. As a result, clicking a meeting link from an email may still launch the outdated client.

Please follow the steps below to see if this resolves the issue:

1.Completely uninstall ALL versions of Teams

• Go to Settings > Apps > Installed apps.
• Search for "Teams".
• Uninstall every entry you see (there are often 2 or 3: "Microsoft Teams", "Teams (work or school)", etc.).

2.Delete leftover cache folders (important)

Press Windows + R, type the following and press Enter:

• %appdata%\Microsoft\Teams
• Delete everything inside this folder (or the whole folder).

Also delete: %localappdata%\Microsoft\Teams

3.Download and install the latest Teams fresh

• Go to the official download page: https://www.microsoft.com/en-us/microsoft-teams/download-app
• Download the Windows version (64-bit).
• Install it and sign in with your work/school account.

4.Restart your computer and test by clicking the meeting link again.

This "clean install" method resolves the outdated message for most users.

Regarding the iPhone Error Message: “Session Error! This session is only available on Android and Windows devices.”

This is not normal for regular Teams meetings. This issue usually appears in two situations:

• The meeting link is for a special "Book an Appointment" or "Scheduling Assistant" page (not a regular Teams meeting).
• The link is designed only for certain platforms (often used in some booking systems or older virtual appointment features).

Here is what you can do:

• Ask the person who sent the link to give you the regular meeting link instead (the one that starts with http//teams.microsoft.com/l/meetup-join/...).
• Or open the link in Safari on your iPhone and try joining via the web version.
• If it's a booking link, try accessing it from a Windows PC or Android device (as the error suggests).

I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this. Thank you for your patience and understanding. If you have any questions or need further assistance, please feel free to share them in the comments so I can continue to support you. I'm looking forward to your reply.

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