Error time in Teams

MineJV-7410 0 Reputation points
2026-08-02T22:29:07.2366667+00:00

Some Teams meetings created in Outlook or Teams are displayed one hour earlier than expected for users located in Sydney and Melbourne. The meeting organizer and attendees are all in the same time zone.

Interestingly, not all users in the same tenant are affected, which makes it difficult to identify the root cause.

Has anyone experienced a similar issue recently?

Microsoft Teams | Microsoft Teams for business | Meetings and calls | Other
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  1. BabybooHN 640 Reputation points Independent Advisor
    2026-08-02T23:09:52.98+00:00

    Dear @MineJV-7410,

    I understand how frustrating it is when Teams and Outlook display meeting times offset by one hour, especially when all participants are in Sydney or Melbourne and within the same time zone.

    This issue typically stems from a Daylight Saving Time (DST) or time zone definition mismatch between the user’s local Windows OS settings, Teams client cache, and the Exchange Online mailbox regional configuration. Microsoft 365 stores all calendar events in UTC. When displaying meetings, the client converts UTC to local time using local DST rules. If any client or mailbox setting lacks the active DST offset rule, meetings appear shifted by exactly one hour.

    Please ask the affected users to complete the following steps to resolve the issue:

    Step 1: Reset Windows Daylight Saving Time Toggle

    1. Go to Windows Settings > Time & Language > Date & Time.
    2. Verify that Time Zone is set to (UTC+10:00) Canberra, Melbourne, Sydney.
    3. Toggle Adjust for daylight saving time automatically to Off, wait 5 seconds, and toggle it back On.

    Step 2: Re-align Outlook Web App (OWA) Mailbox Settings

    Even if Outlook Desktop looks correct, the underlying Exchange mailbox profile may be out of sync.

    1. Log into https://outlook.office.com/mail/
    2. Click the Gear (Settings) icon > General > Language and time.
    3. Confirm the Time Zone is explicitly set to (UTC+10:00) Canberra, Melbourne, Sydney and click Save.

    User's image

    Step 3: Reset Teams Cache & Language Format

    1. Fully close Microsoft Teams (Right-click Teams icon in taskbar > Quit).
    2. Press Win + R, type %appdata%\Microsoft\Teams (or %localappdata%\Packages\MSTeams_8wekyb3d8bbwe for new Teams), and delete the contents to clear the cache.
    3. Relaunch Teams, go to Settings > General, confirm the Language/App region is set to English (Australia), and restart the app.

    Please refer to this document: Clear the Teams client cache

    If multiple users require an automated fix across the tenant, an admin can update the Exchange Online regional configuration directly via PowerShell. For further detailed guidance on configuring regional and time settings in Exchange Online, refer to the official Set-MailboxRegionalConfiguration

    If you have any updates or further questions, please feel free to reply here, I’ll do my best to support you however I can.

    If the answer is helpful, please click "Yes" and kindly upvote it. If you have extra questions about this answer, please click "Comment".   

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