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Office|Office 365

Still No Good Option for Office 365 Backups

Are Office 365 Backups Necessary?

The most popular question people ask me about Office 365 is to recommend how to take backups, specifically for Exchange Online. Few who ask like my answer: Don’t bother. I have been consistent in this opinion for the last five years (see this piece from last year). The feeling gets stronger as time goes by.

I do not blame people for asking about backups. It is natural for those who migrate from an on-premises environment to want to have the same kind of facilities that they have come to depend on when their data is in the cloud. However, applying on-premises principles to Office 365 is never a great idea because this approach ignores the simple fact that Exchange Online is very different to Exchange 2016 (or whatever version you use).

More Challenging as Time Goes By

In fact, backups of Exchange Online become more challenging over time. Users keep more data online than they do on-premises. Microsoft encourages this trend by making 100 GB mailboxes the new norm, not cleaning out the Deleted Items folder automatically, and implementing expandable archive mailboxes (now rolling out after a pause).

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Allowing users to have huge mailboxes makes it more difficult for companies to move away from Office 365. It also makes it more difficult to transport all the data across the Internet from Microsoft’s datacenters to those owned by cloud backup companies.

Recovering from Ransomware

People often raise the prospect of mailbox infection with ransomware as justification for backups. I do not buy this argument because I think Microsoft will restore affected mailboxes more efficiently using the lagged database copy they keep for all mailbox databases than restoring across the internet.

Restoring a few mailboxes from a backup might be OK (and will demo well at trade shows); restoring thousands of them might not be quite so easy. I don’t want to find out.

FUD and Holds

Another fear that people raise is that rogue administrators will remove information or that users will make mistakes and delete something that they really should keep. Or that “a disgruntled employee will purposely destroy information that is useful to the company” or “someone (presumably a hacker or similar) gains unauthorized access and deletes files.

These are valid fears. If they concern you, you should do what some companies do and put all mailboxes on hold using either a legal hold or an eDiscovery hold. No one can remove anything from mailboxes when they come under the scope of a hold as Exchange holds copies of deleted items until the hold is removed. Using holds for this purpose is a little cheaper than investing in a backup product.

But as I keep reminding people, Office 365 is more than Exchange. SharePoint Online, OneDrive for Business, Planner, Teams, and so on also need consideration. Is the right approach to backup all the applications separately? Really?

No Integrated View

Which leads me to the big problem around Office 365 backup. I have not seen backup products that can handle all the data for a tenant from mailboxes to plans to chats to documents. The roots of many backup products are in the on-premises world where backups run inside the strict limits of a single application.

I am waiting for the first ISV to launch a product that can deal with all the data belonging to a tenant, including the ability to restore data so that the links that connect applications like Teams or Office 365 Groups with different data stores come back intact. AvePoint is the first ISV to venture along this path by dealing with the Exchange and SharePoint components of Office 365 Groups, but that is only scratching the surface of the problem.

Lots of ISVs Working on Backups

If you really want to take Office 365 backups, I’m sure that companies like Veeam, Skykick, Spanning, Managecast, Cloudally, StorageCraft, and AvePoint will be happy to discuss how they can help. All will have their own perspective on the matter and will argue their case to justify backups. You should certainly take the time to listen and then make your own mind up. Don’t depend on my opinion.

The list above is not exhaustive. Other ISVs are active in this space and hope remains that someone will come up with a comprehensive service eventually. Six years after Microsoft launched Office 365, perhaps we will see progress in backup technology at the Ignite conference in September. I will be looking!

Follow Tony on Twitter @12Knocksinna.

Want to know more about how to manage Office 365? Find what you need to know in “Office 365 for IT Pros”, the most comprehensive eBook covering all aspects of Office 365. Available in PDF and EPUB formats (suitable for iBooks) or for Amazon Kindle.

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Comments (4)

4 responses to “Still No Good Option for Office 365 Backups”

  1. Vernonsmith

    This Office 365 Backup & Restore is another secure and effective software to take backup of Office 365 mailbox data into PST file. The software also help users to restore PST file to Office 365 account with ease. The software is compatible with all MS Outlook and Office 365 versions.


    Softkaen office365.backup

  2. rosefresh

    I would like to suggest you can also try ZOOK Office 365 Backup Software  is an outstanding tool for hassle-free backup solution which allows users to export entire Office 365 mailbox to local drive without any extra-efforts. Users can convert multiple Office 365 files to 26+ popular saving formats also. Instant Solution to Save Office 365 Mailbox to PST, MBOX, EML, MSG, PDF, XPS, HTML, EMLX, Doc, MHT, RTF, etc.


    For More Info Search on Google zooksoftware.com

  3. jack-collins

    If you want to take a backup of your Office 365 Mailbox in Mac OS. You can use Mac Backup office 365 Software, this tool easily work on Mac OS. And it allows you to backup Office 365 emails, contacts, and calendar to PST, MSG, EML, EMLX, and MBOX. The app gives only a few simple steps to achieve migration from Office 365 folder to the required format in any single and bulk mode just a few minutes. The software supports all versions of Mac OS like (10.11).

    For more information: toolscrunch.com/mac-office365-backup.html

  4. richard-artes

    Barracuda now do a complete Office365 backup solution at 18 euro per user per year.

    I'm not recommending it, just investigating what is out there now (Feb 2021).


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Tony Redmond has written thousands of articles about Microsoft technology since 1996. He covers Office 365 and associated technologies for Petri.com and is also the lead author for the Office 365 for IT Pros eBook, updated monthly to keep pace with change in the cloud.

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