# Microsoft 365 Backup Health Report

The Microsoft 365 Backup Health Report includes information about all Microsoft 365 applications in the environment and indicates whether those applications meet the backup health requirements needed for backup operations. An entity (such as a mailbox, user, or other) meets the backup health requirements if the entity was backed up in the last 3 days.

Information in the report includes the number of entities that are backed up and not backed up. You can use this report to view the backup status of each entity on each client computer in the environment, identify any backup failures for specific mailboxes, users, or other entities, and also determine what caused the failure.

To determine the health of the Microsoft 365 backups, you can refer to the Microsoft 365 Backup Health Report for SLA (Service Level Agreement) and not the job status as it may not reflect it accurately. Job status depends on the connectivity with the cloud and other factors like throttling.

You can use the Microsoft 365 Backup Health Report to help maintain the environment, as follows:

- Go to the Microsoft 365 Backup Health report and view data for the last 3 days because that is the most critical time period.

- If you see that the number of Associated Entities and Entities Backed-up tiles display the same number, then your backups are running perfectly, and there is no need for concern.

- If you see that the value is greater than 0 in the Entities Not Backed-up or Entities Never Backed-up tiles, then you should see the Entities Not Backed-up table to learn more.

- In the Clients Table Entities table, if any entities (such as mailboxes and users) appear in the Not Backed-up and Never Backed-up columns, see the Entities Not Backed-up table to learn more.

- In the Entities Not Backed-up table, in the Backup Status column, configure a filter to display only Failed entities.

- In the Entities Not Backed-up table, review the information in the Failure Reason column.

- You can try to fix some errors on your own. For more information, see Troubleshooting Using the Microsoft 365 Backup Health Report.

- If you encounter an error that you cannot resolve on your own, open a support ticket.

- Mailboxes are marked Skipped for users that do not have a mailbox or when a user mailbox is backed up in another job.

- Mailboxes are marked Failed when the processing mailbox job encounters an error.

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