OWA meeting time shows incorrect time zone using M365

Question

I am facing a unique issue here, where in when using OWA and sending a team meeting invite to someone it shows

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When

Wednesday Feb 4, 2026 - 7:30pm - 8pm (Eastem European Time-Cairo) I

Location

Microsoft Teams Meeting

View map

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but I am in different time zone, already checked (as correct)

1. system time
2. Default time zone selection in OWA Calendar

Kindly suggest resolving this

Moved from: Microsoft 365 and Office | Office Online Server

Answer 1

Dear @RaGau,
Thank you for the additional details. Based on the information you've provided, it appears that the incorrect time zone (e.g., “Eastern European Time – Cairo”) showing in your Teams meeting invitations may be caused by a mismatch or outdated setting in your mailbox’s calendar configuration.

Even though your system time and Outlook on the web (OWA) calendar settings appear correct, Microsoft 365 uses several layers of time zone settings, including your mailbox’s regional and working hours settings which may not always update automatically when you change locations or sign in from different tenants.

Since you mentioned that you previously used another tenant registered in Egypt and sometimes sign in to multiple tenants, it’s possible that cached settings or tenant-specific configurations are influencing your current session. To avoid this:

• Try signing in using a private/incognito browser window.
• Ensure you’re only signed in to the affected account during testing.
• Clear your browser cache and cookies if needed.

Could you please confirm that have you tried the steps above? if yes and the issue persists, it may be necessary to check your mailbox’s backend settings using PowerShell. Your IT administrator can run the following command to verify your calendar’s working hours time zone:

Set-MailboxCalendarConfiguration -Identity <user time zone> -WorkingHoursTimeZone "Your Correct Time Zone"

For reference: Set-MailboxCalendarConfiguration

I truly appreciate your patience and understanding. If I misunderstood what you’re looking for, feel free to let me know or share a screenshot. I’d be happy to help further!

I'm looking forward for your reply. Thank you for your cooperation.

Answer 2

Dear @RaGau,
Thank you for posting your question in the Microsoft Q&A forum. I understand that you’re creating Microsoft Teams meetings in Outlook on the web (OWA), and the meeting invitation shows an incorrect time zone (for example, Eastern European Time – Cairo), even though your system time and Outlook settings appear correct.

To better assistance, could you please confirm following information:

Does this issue happen only when creating meetings in Outlook on the web, or also in Outlook desktop or mobile?

Does it affect only new meetings, or existing meetings as well?

Is the issue happening only for your mailbox, or do other users in the same organization see the same behavior?

Do meeting recipients also see the incorrect time zone on their side?

In Outlook on the web, under Settings > Calendar > View, does the displayed time zone show the correct city and region?

Have you recently changed your location, time zone, or signed in from a different country?

Does temporarily changing the time zone in Outlook on the web and changing it back resolve the issue?

Are you signed in to multiple tenants or guest accounts in the same browser session?

In the meantime, please try some steps below:
1/ Sign in to Outlook on the web.

2/ Go to Settings > Calendar > View and temporarily change your time zone to a different one.

3/ Save the change, then change it back to your correct time zone and save again.

4/ Sign out of Outlook on the web and sign back in, then create a new meeting and check the time.

Please understand that our initial response does not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution. Your detailed response will help us diagnose and investigate the issue more efficiently.

I truly appreciate your patience and understanding. If I misunderstood what you’re looking for, feel free to let me know or share a screenshot. I’d be happy to help further!

I'm looking forward for your reply. Thank you for your cooperation.

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Answer 3

It seems that the issue you are experiencing with the incorrect time zone in Outlook on the Web (OWA) when sending a Teams meeting invite could be related to the calendar settings of the attendee or the organizer. Here are some steps you can take to troubleshoot and potentially resolve the issue:

1. Verify Time Zone Settings: Ensure that both the organizer's and the attendee's mailbox settings reflect the correct time zone. You can check this by using the following PowerShell cmdlet in Exchange Online:

      Get-MailboxCalendarConfiguration -Identity <user> | FL WorkingHoursTimeZone
   

   Replace <user> with the email address of the attendee.
2. Check for Corrupted Calendar Settings: If the time zone settings are correct but the issue persists, it may be due to corrupted calendar settings. You can use the MFCMAPI tool to reset the work hours of the attendee. This requires full access permissions to the attendee's mailbox. Follow the steps outlined in the Microsoft documentation for using MFCMAPI to delete entries related to IPM.FlexibleWorkingHours in the calendar.
3. Set Work Hours: After resetting the calendar settings, ensure that the work hours for the attendee are set correctly in OWA.

If these steps do not resolve the issue, it may be beneficial to contact Microsoft support for further assistance.

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References:

• Meeting shows an incorrect time zone for an attendee
• Meeting shows an incorrect time zone for an attendee