How to fix calendar error (The message store has reached its maximum size.)?

Question

The full error I am getting is "The message store has reached its maximum size. To reduce the amount of data in this message store, select some items that you no longer need, and permanently (SHIFT + DEL) them".

This happens a few times a day when trying to add something to my outlook shared calendar, I have deleted messages and previous saved items in the calendar, but still, I get this message. After a while sometimes it will start working again, but I don't have a day that goes by without this error. This is happening to me and others with this calendar as it is shared.

Closing and reopening Outlook does not make a difference.

Answer 1

Hi @Minz ,

Welcome to our forum!

The full error I am getting is "The message store has reached its maximum size. To reduce the amount of data in this message store, select some items that you no longer need, and permanently (SHIFT + DEL) them".

Based on my research on the error you provided, i found that issue may occur when a Microsoft 365 user tries to delete an item such as a calendar event in Outlook or Outlook on the Web. And this issue occurs if the items in the Recoverable Items folder of the user's mailbox exceed the default quota of 30 gigabytes (GB). If you are using a Microsoft 365 account, it's suggested that you could refer to the official article and try the solution:

More information: (Message store has reached its maximum size) error when a Microsoft 365 user tries to delete an item in Outlook or Outlook on the Web.

Hope to help you!

---

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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