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The message store has reached its maximum size

IniobongNkanga-8038 931 Reputation points
2025-01-22T02:52:50.14+00:00

Hello,

Please i need your help on this issue.

The message store has reached its maximum size.

We got an error message that says:

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.

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  1. Amit Singh 5,071 Reputation points
    2025-01-22T03:52:11.87+00:00

    Hi @IniobongNkanga-8038 , it looks like your mailbox has reached its storage limit.

    1. You can delete the unnecessary emails that are no longer for your use.
    2. Move old emails to an archive to reduce the space used in your mailbox.

    Once you free up space, you should be able to send and receive emails again without any issues.

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

  2. Alex Zhang-MSFT 3,940 Reputation points Microsoft Vendor
    2025-01-22T07:22:06.5833333+00:00

    Hello, @@IniobongNkanga-8038，

    Welcome to the Microsoft Q&A platform!

    This issue occurs if the items in the Recoverable Items folder of the user's mailbox exceed the default quota of 30 gigabytes (GB).

    To fix this issue, use either of the following methods:

    • Make sure that Litigation Hold or In-Place Hold is enabled. If either feature is enabled, the storage quota for the Recoverable Items folder is automatically increased from 30 GB to 100 GB.
    • Enable the archive mailbox, turn on the auto-expanding archiving feature in Exchange Online, and then create a custom retention policy for mailboxes on hold. After you complete these steps, the storage quota for the Recoverable Items folder in the user's archive will be unlimited.

    About how to increase the storage quota, see Increase the Recoverable Items quota for mailboxes on hold.

    For more information, please refer to Message store has reached its maximum size error when a Microsoft 365 user tries to delete an item - Exchange | Microsoft Learn.

    Should you need more help on this, you can feel free to post back. 

    If the answer is helpful, please click on “Accept answer” as it could help other members of the Microsoft Q&A community who have similar questions and are looking for solutions.

    Thank you for your support and understanding.

    Best Wishes,

    Alex Zhang

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