Calendary entries have disappeared

Question

All of my calendar entries have disppeared, I need to recover them.

Answer 1

Hi @Dennis Shelly 

Welcome to the Microsoft Q&A forum. 

Thank you for letting us know what’s happening with your calendar. I’m really sorry you’re going through this, especially when you rely on your calendar to stay organized. I want you to know that you’re not alone in this, and I’m here to help you get everything back on track. 

Based on what you’ve described, this issue is usually related to how the New Outlook handles synchronization between accounts. Calendar entries may appear missing, delayed, or fail to sync for a few reasons, such as account configuration problems, a corrupted cache, or conflicts with multiple calendars. 

To help move us forward, here are a few steps that typically resolve this: 

Cache clearing and application reset procedures 

Calendar sync problems often stem from corrupted local caches files that prevent proper synchronization with Exchange Online servers. 

1/ Account verification and basic sync restoration 

• Open Outlook > File > Account Settings and confirm your account shows as Connected. 
• Select your account > Account Settings > confirm Exchange server details are correct. 
• Go to File > Options > Mail > Send/Receive Groups and ensure your account is included in automatic sync. 
• In Calendar, right‑click your main calendar > Properties > check permissions/sharing. 
• Click Send/Receive in the ribbon and note any sync errors. 

2/ Cache clearing and application reset procedures 

• Close Outlook. Go to Settings > Apps > Installed Apps > Microsoft Outlook > Advanced Options. 
• Click Repair. If issues remain, choose Reset (keeps account setup). 
• To clear cache manually: opening File Explorer and navigating to %localappdata%\Microsoft\Outlook, then deleting the contents of the cache folder while Outlook is closed. 
• Reopen Outlook and allow it to resync the calendar. 

You may find further guidance here: How to fix Calendar Sync Issues in New Outlook? 

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. 

Since you have checked all the steps, but the issue still persists, I believe Microsoft Support Engineering should step in to investigate further. Please reach out to them directly. 

• Ticket Support: In the Microsoft 365 Admin Center>Support>Help & Support. You can raise support ticket. Please note that you’ll need an account with admin rights to sign in to the Microsoft 365 Admin Center.  
• Phone Support: Microsoft provides customer service phone numbers based on your region. You can find the appropriate contact number here.   

Note: I appreciate your understanding regarding the scope of support available through this forum. As moderators, my role is to provide general guidance and assist with common troubleshooting steps. While I do not have access to internal systems or administrative tools required to resolve account-specific or backend-related issues but I’ll continue doing our best to support you within the scope of our responsibilities.   

I hope this information is useful. As other users will also be searching for guidance in this community, clicking “Accept Answer” would be a wonderful way to amplify your impact. Your action not only helps others with similar questions find the right solution faster, it also highlights your role in shaping a more helpful and informed community.    

Thank you again for your time and for raising this important usability concern. If you have any further questions or need additional assistance, please don’t hesitate to reach out. 

I look forward to your thoughts on this. 

---

Note: Please follow the steps in our documentation to enable email notifications if you want to receive notifications related to this thread.