Good day, and I appreciate how clearly you outlined your concern. In Outlook, the reminder value is stored within each meeting item, so the reminder you see is typically determined by what the organizer included in the invitation. When an invitation arrives without a reminder value, which can happen with some external meeting sources, Outlook may not be able to apply your personal preference automatically. At this time, Outlook does not provide a built in option to force an automatic override for all accepted invitations regardless of the sender, so submitting this as product feedback remains the best path for the feature request.
Please follow the solutions below, as each option fits a different meeting invite workflow.
1/ Set a default reminder in new Outlook for Windows or Outlook on the web
- Open Outlook, then open Settings.
- Select Calendar, then select Events and invitations.
- Under Events you create, select Default reminder, then choose the reminder time you prefer, and save the change if prompted.
- When a specific meeting still arrives without a reminder, open it from Calendar, then use the Reminder dropdown to select your preferred reminder time, and save the update.
2/ Set default reminders in classic Outlook for Windows, then standardize meetings that do not carry reminders
- In classic Outlook, select File, then select Options, then select Calendar.
- Under Calendar options, enable Default reminders and set the time you want for new calendar ite
- nFor meetings that arrive with no reminder, open the meeting from Calendar, select the Reminder dropdown, choose your preferred time, then save and close.
- For recurring meetings, apply the reminder to the entire series when prompted, so you do not need to repeat the change for each occurrence.
- Reference: Add or delete notifications or reminders in Outlook - Microsoft Support
3/ Advanced option for internet calendar based invitations, enable reminder creation for webcal items
- Close Outlook and other Office apps, then open Registry Editor on Windows.
- Go to the Outlook webcal options location for your Outlook version, then create a new DWORD value named AllowReminderCreation.
- Set AllowReminderCreation value data to 1, then close Registry Editor.
- Restart Outlook and test again with an invitation that comes through an internet calendar subscription to confirm whether reminders can now be created for that invitation type.
- Reference: Reminders aren't created after you import webcal calendars to Outlook - Microsoft Support
I hope this information is helpful. Should you have any further questions or need additional assistance for you and your IT admin, please feel free to reach out.
Thank you for your patience and your understanding. I look forward to continuing the conversation.
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