What is the most likely cause of the files being deleted?

Your company has a Microsoft 365 subscription.

You upload several archive PST files to Microsoft 365 by using the Security & Compliance admin center.

A month later, you attempt to run an import job for the PST files.

You discover that the PST files were deleted from Microsoft 365.

What is the most likely cause of the files being deleted? More than one answer choice may achieve the goal. Select the BEST answer.
A . The PST files were corrupted and deleted by Microsoft 365 security features.
B . PST files are deleted automatically from Microsoft 365 after 30 days.
C . The size of the PST files exceeded a storage quota and caused the files to be deleted.
D . Another administrator deleted the PST files.

View Answer

Answer: B

Explanation:

You can use the Office 365 Import Service to bulk-import PST files to Office 365 mailboxes.

When you use the network upload method to import PST files, you upload them to an Azure blob container named ingestiondata. If there are no import jobs in progress on the Import page in the Security & Compliance Center), then all PST files in the ingestiondata container in Azure are deleted 30 days after the most recent import job was created in the Security & Compliance Center.

Reference: https://docs.microsoft.com/en-us/office365/securitycompliance/faqimporting-pst-files-to-office-365