Discover why Microsoft, NIST, and the ACSC recommend offline backups for your M365 data. Learn essential strategies to protect your critical information from cyber threats and service disruptions.

Learn how BackupAssist 365 uses versioning to preserve the history and accessibility of your Microsoft 365 data.

Worried about securing your Microsoft 365 data? Dive into the must-know strategies for seamless backups in an era of cyber threats.

Note: This blog article is an update to this article: https://www.backupassist.com/blog/mailbox-does-not-exist-errors-for-microsoft-365-mailbox-backups, which was published on August 29, 2023. This article relates to the issue where

Microsoft recently made changes to the Contacts folders in user mailboxes, which has broken their own API and caused BackupAssist 365 backups to stop. We have just produced an emergency workaround – please read on for the details.

Learn more about the various Microsoft Office 365 cloud-to-cloud backup failure reasons and why local storage is a superior alternative.