Fix Outlook Reminder Will Not Appear in an Unsupported Folder
Question details
The user receives a warning message in Outlook stating that calendar event reminders will not trigger because the designated folder does not support them.

- Product
- Outlook for Microsoft 365
- Device & OS
- not provided
- Scenario
- Creating or editing an appointment in Outlook while utilizing an iCloud calendar synchronization.
- Observed behavior
- Outlook displays a warning that the appointment reminder will not appear because the item is stored in a folder that does not support reminders.
Ensure that your Outlook desktop client is updated to the latest version and that the iCloud for Windows app is installed and actively signed in on your computer.
Enable the iCloud Outlook Add-in
Re-enabling the iCloud Outlook add-in restores proper synchronization between Outlook and your Apple ecosystem, often resolving the reminder limitation warning.
Outlook sometimes disables third-party add-ins automatically if it detects that they are slowing down the application's startup time. When the iCloud add-in is disabled, calendar events may fail to sync properly, leading to unsupported folder errors.
Launch Outlook, click on the 'File' tab in the top-left corner of the ribbon, and select 'Options' from the bottom of the left-hand menu.
In the Outlook Options window, click on 'Add-ins' in the left pane. At the bottom of the screen, ensure the 'Manage' dropdown is set to 'COM Add-ins' and click the 'Go...' button.
Locate the 'iCloud Outlook Add-in' in the list of available add-ins. Check the box next to it to enable it, then click 'OK'. Restart Outlook for the changes to take effect.

Set Reminders Directly on an Apple Device
Bypass the Outlook local reminder limitation by allowing the event to sync and configuring the alert directly on your iPhone or iPad.
Switch to WPS Office for a Seamless Productivity Experience
While Outlook's complex add-in requirements can cause synchronization issues with third-party services like iCloud, WPS Office offers a lightweight, easy-to-use, and highly compatible alternative for your daily document, spreadsheet, and presentation needs. Enjoy familiar interfaces and robust compatibility without the heavy resource drain.
- 1. Download WPS Office: Visit the official WPS website and download the free installation package for your operating system.
- 2. Install and Launch: Run the installer and follow the on-screen instructions. Launch the application once the installation is complete.
- 3. Open Your Files: Simply drag and drop your existing Microsoft Office files into WPS Office to continue your work without losing any formatting.

Frequently Asked Questions
Why does Outlook say my folder does not support reminders?
This message typically appears when you save an event in a calendar folder synchronized via a third-party service (like iCloud or an IMAP connection) that does not natively integrate with Outlook's local reminder system.
Will my calendar event still sync to iCloud if I ignore the warning?
Yes, as long as the iCloud add-in is active, the event itself will successfully synchronize to your iCloud account and appear on your other devices. The warning only means that the Outlook desktop application won't generate a pop-up reminder on your PC.
Does this reminder issue affect native Microsoft Exchange accounts?
No. Exchange and Outlook.com calendars natively support Outlook's reminder features. This limitation is specific to internet calendars and third-party syncing tools like iCloud for Windows.




