Article ID: 2714467 - View products that this article applies to.
Email messages that are older than 30 days are missing from the Deleted Items folder of a user's mailbox in your organization. This problem occurs even though the default email retention period for deleted items was extended in Exchange Online.
This problem can occur if one of the following conditions is true:
To increase the retention period for the Deleted items folder, do one of the following:
In Exchange Online, the length of time that items in remain in the Deleted Items folder was extended from 30 days to indefinitely or to the duration that is set by the administrator. This retention period can be overridden either by renaming the Default MRM Policy or by assigning a custom retention policy to a mailbox.
For more information, see the following resources: