Hi @Shields, Janeen M,
Thank you very much for reaching out regarding the missing “15‑minute before meeting” pop‑ups. I really appreciate your patience and for flagging this meeting reminders are critical.
A - What’s likely going on
The reminder system relies on the built‑in Outlook reminder window. If the “Show reminders” option in File > Options > Advanced is turned off, the 15‑minute meeting pop‑up will not appear. This is a common issue. Additionally, if Windows has Do Not Disturb / Focus enabled or if notifications for Outlook are turned off, the reminder pop‑ups can be suppressed.
B - Recommended next steps
Here are my recommendations, please follow the steps below:
1/ Enable reminders (and keep them on top of other windows)
- Outlook > File > Options > Advanced > in Reminders, check Show reminders.
- Check Show reminders on top of other windows so the reminder window doesn’t hide behind other apps (Recommended).
-

2/ Set a default reminder time for calendar items
- File > Options > Calendar > enable Default reminders and set 15 minutes (or your preference).
-

3/ Refresh the reminder cache if needed
- Close Outlook. Press Windows+R, run: outlook.exe /cleanreminders
- If reminders still don’t appear, run: outlook.exe /resetfolders
(Then reopen Outlook and test.)
4/ Quick extra checks
Microsoft Teams status: if it’s set to Do not disturb, Windows may suppress Outlook notifications set it back to Available.

For additional information, you can refer to these articles:
Please note that this information is being provided by the moderator solely for your convenience. The referenced sites are not managed or overseen by the moderator, and therefore we cannot guarantee the accuracy, security, or suitability of any software or content available there. We recommend reviewing all information carefully and ensuring you understand any associated risks before following suggestions from the provided link.
C - Contact support
If the issue still continues, please contact your IT administrator so they can help verify whether any organization‑wide policies, notification restrictions, or Outlook configuration controls are preventing reminders from appearing.
In case your IT department cannot access the necessary information or make the required changes, I recommend asking them to open a request with Microsoft Support team through the Microsoft Admin Center. They have access to backend configurations and can perform a more in-depth investigation. At the very least, they can provide the most effective workaround to ensure your experience remains smooth and secure.
We kindly ask for your understanding that, as moderators, we do not have access to the administrative tools or permissions required to investigate or modify these configurations. We also do not have the capability to initiate remote sessions for direct assistance. Our role is to guide users to the appropriate resources and support channels.
I hope this information is helpful. Should you have any further questions or need additional assistance, feel free to reach out.
I look forward to hearing your thoughts on this.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have any extra questions about this answer, please click "Comment".
Note: Follow the steps in our documentation to enable email notifications if you want to receive email notifications related to this topic.