How Often Should Microsoft 365 Be Backed Up?
Several times a day, because the gap between captures is the most work a client can lose. Every four hours, six captures a day, keeps that to a few hours of mail and files, and it's the cycle EnterProtect runs on every tenant. Frequency is only half of it, though. A backup is worth what you can restore from it.
What Frequency Buys, and What It Doesn't
With one capture a day, a mailbox emptied at 4 PM comes back as it was at the last capture, and everything since is gone. More captures shrink that gap. Two things matter as much. Retention, because the request to restore often arrives long after the deletion. And proof that each capture finished, because a schedule that silently stopped is a frequency of zero. The commonest silent stop in Microsoft 365 backup is a client's admin tidying up the backup app's consent.
The Arithmetic
| Captures a day | Time between captures | Most work at risk |
|---|---|---|
| 1 | 24 hours | A full day |
| 3 | 8 hours | A working day |
| 6 | 4 hours | Half a working day |
Why Four Hours, With Nothing to Set
EnterProtect captures Exchange Online, OneDrive, SharePoint and Teams every four hours on every tenant. On Complete, Entra ID runs on the same cycle with a full reconciliation every day. There's no tier to buy and no schedule to get wrong per client. Microsoft limits how fast any backup can read, so a busy tenant's cycle takes longer than a quiet one's: slower, never smaller. A tenant that falls behind raises an RPO breach you work like any overdue backup. Before a risky change, take an on-demand capture. It doesn't reset the cycle.
The First Capture Is Different
The first backup of a tenant is a full baseline and takes as long as Microsoft allows: hours for a small tenant, days for thousands of users. Coverage appears first, so you see what's in scope before it all lands. After the baseline, the four-hour cycle starts.
Microsoft 365 Backup Schedule Questions
Can I back up more often than every four hours?
EnterProtect runs one standard four-hour cycle and doesn't sell a faster tier. When you need a point right now, before a migration or a bulk permission change, take an on-demand capture from the tenant.
How long should Microsoft 365 backups be kept?
As long as the client needs. With EnterProtect you set a default and override it per mailbox or site: 30 days, 1 year, 3 years, 7 years, a custom length, or for as long as the client stays protected. Retained data counts toward your pooled storage.
Does it back up the tenant's settings too?
On Complete, yes: Entra ID, Conditional Access, Intune policy, BitLocker keys and Planner, so a damaged tenant can be rebuilt in place, not only its data restored. Essential covers Exchange Online, OneDrive, SharePoint and Teams.
Want Six Captures a Day and Nothing to Configure?
EnterProtect Microsoft 365 Backup captures every workload every four hours and proves every restore with a signed report.
More Answers
See Every AnswerDoes Microsoft Back Up Microsoft 365?
Not by default, and not in the way your client means.
What Happens to a Client's Backups When They Change MSP?
Usually the backup history stays behind with the outgoing MSP's tools, and the incoming MSP starts the client from zero.
What Is an Immutable Backup?
An immutable backup is a copy that can't be changed or deleted until a set date, by anyone, including the administrator who made it.