What is the difference between retention and backup in Microsoft 365?
Retention and backup in Microsoft 365 have different purposes. Retention is about preserving data for a specific period of time for compliance and legal requirements, while backup is a separate backup that allows full and flexible recovery of data in case of loss, mistakes, or cyberattacks. Retention protects the existence of the information – backup protects the ability to restore it.
What is retention?
Retention policies in Microsoft 365 (via Microsoft Purview) control how long data is stored and when it can be deleted. The purpose is to meet legal, regulatory and internal requirements.
Focus on compliance
Retention ensures that data is not deleted before a certain period of time has passed, even if the user tries to delete it.
Automatic handling
Policies can be automatically applied to email, SharePoint, OneDrive and Teams.
Not a full recovery solution
Retention is not designed for rapid mass recovery or disaster recovery.
What is backup?
Backup is a standalone copy of data that is stored separately from the production environment and can be restored if necessary.
Protection against data loss
Backup protects against accidental deletion, ransomware, account deletion and system failure.
Flexible recovery
Enables the recovery of individual objects, entire accounts or complete environments.
Storage outside Microsoft 365
Backups are often stored in a separate environment for extra security and isolation.
Retention vs Backup – comparison
- Purpose: Retention = compliance, Backup = recovery.
- Storage: Retention is stored within Microsoft 365, Backup is stored separately.
- Protection against deletion: Retention prevents early deletion, Backup allows recovery after loss.
- Ransomware protection: Backup provides extra protection through isolated copy.
- Recovery flexibility: Backup provides more extensive recovery options.
Related questions
Can retention replace backup?
No, retention is not a complete recovery solution.
Do you need both?
Yes, many organizations use retention for compliance and backup for secure recovery.
Does retention protect against ransomware?
It can preserve data according to policy, but backup provides stronger protection through separate storage.
Where is retention configured?
In Microsoft Purview and in Microsoft 365 Admin Center.
Is backup a legal requirement?
It depends on the industry and regulatory framework, but it is highly recommended for data protection.
