Most of the reminders of outlook is dissapere

Question

Hello all

Specific user all is work depends on the reminders.

She works on outlook classic 365.

We try outlook/cleanriminders. New profile. Repaired office. Delete folder "option" from registry.

Todo windows showing all her tasks but not shown in the reminders.

Web access also not shown the reminders. there is any way to restore it?

Regards

Rafi

Answer 1

Thank you

The reminders back.

Answer 2

For this scenario, Outlook and Outlook on the web both not showing task reminders while To Do still lists the tasks indicates a reminders/reminder-folder issue rather than a local Outlook-only problem.

Use these steps in order:

1. Confirm reminders are enabled in Outlook Classic
   1. In classic Outlook, select File > Options > Advanced.
   2. In the Reminders section, make sure Show reminders is checked.
   3. Select OK.
   If this option is greyed out, it may be controlled by Group Policy and must be changed by the domain administrator.
2. Check the registry setting for reminders (per-user) Warning: Editing the registry incorrectly can cause serious problems. Only do this if comfortable with Registry Editor and after backing up the registry.
   1. Open regedit.
   2. Go to: HKEY_CURRENT_USER\Software\Microsoft\Office\<x.0>\Outlook\Options\Reminders where <x.0> is the Outlook version (for Microsoft 365 classic Outlook this is typically 16.0).
   3. Look for a DWORD value named Type:
      • 0 = do not display reminders.
      • 1 = display reminders.
      • If Type does not exist, the default behavior is to display reminders.
   4. If Type is present and set to 0, change it to 1.
   If Group Policy is used, the key path is: HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\<x.0>\Outlook\Options\Reminders In that case, the domain admin must change or remove the policy value.
3. Repair a possibly corrupted Reminders folder Since /cleanreminders and profile recreation were already tried, use the full corruption-remediation path:
   1. Close Outlook.
   2. Run the command:

            outlook.exe /cleanreminders
      

      again to ensure the reminders table is rebuilt.
   3. If reminders still do not appear, use MFCMAPI to delete and recreate the Reminders folder:
      • Download MFCMAPI from the GitHub “Latest release”.
      • Exit Outlook.
      • Open MFCMAPI.
      • Select Tools > Options, enable:
        • Use the MDB_ONLINE flag when calling OpenMsgStore
        • Use the MAPI_NO_CACHE flag when calling OpenEntry
      • Select Session > Logon, choose the affected profile.
      • Double-click the mailbox store.
      • Expand Root Container.
      • Right‑click the Reminders folder and select Delete folder.
        • Do not delete individual items inside this folder; delete only the folder itself.
      • Close MFCMAPI.
      • Run:

                outlook.exe /cleanreminders
        

        or

                outlook.exe /resetfolders
        

        to recreate the Reminders folder and repopulate valid entries.
4. Re-sync calendar data if sync issues are suspected If the mailbox is on Exchange/Microsoft 365 and there are sync issues that might affect reminders:
   1. In Outlook, right‑click the affected calendar.
   2. Select Properties > Clear Offline Items > OK.
   3. On the ribbon, select Send / Receive > Update Folder to download items again from the server.

If after these steps reminders still do not appear in either Outlook Classic or Outlook on the web, the next step is to involve the Exchange/tenant administrator to check for mailbox-level corruption or policies affecting reminders on the server side.

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References:

• Reminders in Outlook do not appear
• Add or delete notifications or reminders in Outlook
• Calendar reminders in Outlook can't be dismissed or keep reappearing
• Outlook issues, including reminders that fail to appear, messages stuck in the Outbox, and Desktop Search indexing problems