Use retention policies and retention labels instead of older features
If you need to proactively retain or delete content in Microsoft 365 for data lifecycle management, we recommend that you use retention policies and retention labels instead of the following older features.If you currently use these older features, they will continue to work side by side with Microsoft 365 retention policies and retention labels. However, we recommend that going forward, you use Microsoft 365 retention policies and retention labels to benefit from a single solution to manage both retention and deletion of content across multiple workloads in Microsoft 365.Older features from Exchange Online: For more at Data Retention Policy Retention tags and retention policies, also known as messaging records management (MRM) (deletion only) However, if you use the following MRM features, be aware that they aren't currently supported by Microsoft 365 retention policies:An archive policy for archive mailboxes to automatically move emails from a user's primary mailbox ...