Need to Restore PST Files to Office 365 Mailboxes - What's the Best Approach
Hey everyone, I have a task coming up where I need to restore several PST files back into Office 365 mailboxes. Haven't done this before at this scale and honestly not sure where to begin. I've looked at Microsoft's native import service through Purview but I have a few concerns: Some of the PST files are quite large — not sure how well it handles that I need to restore only specific folders for some users, not the entire PST I'm worried about data consistency after the restore Would prefer something that doesn't require too many admin roles or complex setup For those who have done PST to Office 365 restores — what approach worked best for you? Any tools, tips, or things to watch out for that you wish you knew before starting?Planning to Migrate OST Files to Microsoft 365 - Need Some Guidance Before I Start
Hey folks, I have a task coming up where I need to migrate OST files into Office 365 mailboxes. A few of the OST files I'm dealing with are orphaned or corrupted which is making me a bit nervous about the whole process. A couple of things I'm unsure about: How to handle OST files that are no longer linked to an active profile Whether corrupted OST files can still be migrated to Office 365 without major data loss Best way to verify data integrity after migration Haven't started yet and want to make sure I'm going in the right direction before I begin. Has anyone migrated corrupted or orphaned OST files to Office 365? What approach worked best for you?Moving Office 365 Mailboxes to IMAP Servers - What’s the Best Approach
I’ve recently been looking into scenarios where organizations need to move mailboxes from Microsoft 365 to IMAP based email servers, and I noticed this is still a common requirement in many migrations. In most cases, the challenge is not just moving emails, but making sure everything like folder structure, old emails, and user data stays intact without creating too much disruption for users. From what I’ve seen, doing this manually can get very complex, especially when there are multiple mailboxes or large data volumes involved. That’s where migration tools usually come into the picture. Most tools simplify things by handling: 1. Secure connection to Microsoft 365 accounts 2. Bulk mailbox migration 3. Preserving folder hierarchy 4. Reducing downtime during the move 5. Avoiding duplicate data issues One thing I’ve noticed is that running a small pilot migration first always helps. It gives a clear idea of how the actual migration will behave before moving all users. Has anyone here worked on Office 365 to IMAP migration at scale? Would be good to know what approaches or tools worked best in your case and what challenges you faced during the process.Office 365 Mailbox Export to PST - Third Party Tools: What’s Your Experience?
Exporting Office 365 mailboxes to PST is still a common requirement in many Microsoft 365 environments, especially for backup, compliance, and migration scenarios. While Microsoft offers native options like Purview eDiscovery and Outlook export, many administrators also consider third-party tools when dealing with large mailboxes or bulk export requirements. In real-world scenarios, factors like speed, ease of use, permission handling, and consistency of exported data often influence the choice of tool. Some teams prefer native methods for compliance control, while others explore third-party solutions to simplify large-scale or repeated export tasks. For those working with Microsoft 365, what has your experience been with third-party PST export tools? Have they helped in your environment, or do you still rely mainly on Microsoft’s native options?How Microsoft 365 Backup works and how to set it up
Protect your Microsoft 365 data and stay in control with Microsoft 365 Backup — whether managing email, documents, or sites across Exchange, OneDrive, and SharePoint. Define exactly what you want to back up and restore precisely what you need to with speeds reaching 2TB per hour at scale. With flexible policies, dynamic rules, and recovery points up to 365 days back, you can stay resilient and ready. In this introduction, I'll show you how to minimize disruption and keep your organization moving forward even in the event of a disaster with Microsoft 365 Backup. Fine-tune what gets backed up. Back up by user, site, group, or file type — to meet your exact needs. Get started with Microsoft 365 Backup. Restore data in-place or to a new location. Compare versions before committing. Take a look at Microsoft 365 Backup. Restore content from months ago. Use fast weekly snapshots — even when the issue went unnoticed for weeks. Start here with Microsoft 365 Backup. QUICK LINKS: 00:00 — Automate recovery process 00:37 — How to use Microsoft 365 Backup 01:49 — Compare with migration-based solutions 02:30 — How to set it up 03:33 — Exchange policy for email backup 05:00 — View and manage backups 05:24 — Recover from a restore point 07:45 — Restore from OneDrive & SharePoint 08:33 — Bulk restore 09:41 — Wrap up Link References Check out https://aka.ms/M365Backup Additional backup and restore considerations at https://aka.ms/M365BackupNotes Unfamiliar with Microsoft Mechanics? As Microsoft’s official video series for IT, you can watch and share valuable content and demos of current and upcoming tech from the people who build it at Microsoft. Subscribe to our YouTube: https://www.youtube.com/c/MicrosoftMechanicsSeries Talk with other IT Pros, join us on the Microsoft Tech Community: https://techcommunity.microsoft.com/t5/microsoft-mechanics-blog/bg-p/MicrosoftMechanicsBlog Watch or listen from anywhere, subscribe to our podcast: https://microsoftmechanics.libsyn.com/podcast Keep getting this insider knowledge, join us on social: Follow us on Twitter: https://twitter.com/MSFTMechanics Share knowledge on LinkedIn: https://www.linkedin.com/company/microsoft-mechanics/ Enjoy us on Instagram: https://www.instagram.com/msftmechanics/ Loosen up with us on TikTok: https://www.tiktok.com/@msftmechanics Video Transcript: -If something bad happens, like someone accidentally does a bulk file deletion or files are corrupted by a malicious user or ransomware, the first question is, can we recover from our backup? And the second question is, how long until we’re back online? Now to help you automate a targeted recovery process, Microsoft 365 Backup has a self-service solution that helps you scope the data that you want to recover. Your data remains inside your Microsoft 365 trust boundary, providing bulk restore recovery speeds of up to 2 terabytes per hour at scale. -Now, you might be wondering, do I even need to back up Microsoft 365 data? Let’s look at where it makes sense. So, first, if there’s a natural disaster, Microsoft 365 already natively offers high availability and disaster recovery with built-in service resiliency. That said, if you experience a data breach or maybe unexpected data corruption from a processor person on your end, or because of ransomware, your Microsoft support options depend on the workload in Microsoft 365. For example, for SharePoint, if you do nothing additional at all, when you contact Microsoft Support, if the event happened up to 14 days prior, Microsoft will recover OneDrive and SharePoint to a previous state within that timeframe. That said, if you want to get more specific on what gets restored or want to go back further than 14 days to recover your data, this is where the Microsoft 365 Backup service comes in. It’s self-service by design for SharePoint Exchange and OneDrive, giving more targeted control to scope exactly what you need to restore for up to 365 days. We’ll be adding more Microsoft 365 Backup coverage to other Microsoft 365 workloads over time. -Let’s compare this with migration solutions that you may be familiar with. These solutions work by moving your data and transforming it to store it into their service. Then, for recovery, the backup has to be restored back to its original form, then migrated back to your Microsoft 365 tenant, adding significant recovery time. Instead, Microsoft 365 Backup takes incremental snapshots of your data. The data stays in your Microsoft 365 service boundary in its native encrypted form. So, when you need to recover your data, the recovery process is accelerated. Microsoft 365 Backup is a consumption-based service with billing based on the amount of data protected. -Next, let’s walk through the setup steps and controls to manage backups and restore them. Starting with setting up a billing plan, where in advance, you’ll need to have an Azure subscription as well as a defined resource group. So, from the Microsoft 365 admin center under Setup, you’ll activate pay-as-you-go services and select Get started. Here, I’ll choose my Azure subscription and the resource group, and the region. Note that this region here is only used for billing. Your data will remain in the location that it’s currently in. Now, still on this page from the Settings tab, in the Storage location, you’ll choose Backup. Then, turn it on and save to confirm. -Now, with the service running, the rest of the steps will be performed from the Microsoft 365 Backup page in the admin center. So, here, I can configure backup policies to initiate automated backup processes. I have navigated within settings to Microsoft 365 Backup. From there, each workload, SharePoint, Exchange, and OneDrive, can have its own individual policies. So, I’m going to walk through an Exchange policy for email backup, but all three follow similar steps. After hitting Set up policy, the overview page displays policy attributes like the backup frequency. In this case, it’s every 10 minutes. The backup retention up to one year. -Now, the backup frequency does not impact your costs. Here, I can choose the selection method. The options are to upload a CSV file with mailboxes. Now, for SharePoint policies, this would be sites, and for OneDrive, we’d target user accounts. You can also use a dynamic rule, which allows the mailboxes in scope to dynamically update as group membership changes. Or you can define specific filters where you can select up to three distribution lists or security groups, or both. Now, these are the same filters for OneDrive policies. And for SharePoint, you can use filters for site names, URL contains values, or site last modified dates. The final option is then to select mailboxes individually, where you can manually select the mailboxes that you want to back up. In my case, I’ll choose the dynamic rule and use distribution lists, and I’ll select Project Falcon and Northwind Traders. -Now, I just need to review, and from there, I can create the policy. The policy will typically be active within an hour of creation, depending on the size of your group, and you can edit policy attributes at any time. So, now with the policy created, let’s move on to the process of viewing and managing backups. I’m back on the Microsoft 365 Backup page, and now I have active policy set up for each workload. And as mentioned, I can make required edits and changes to these policies from here. For example, you can pause backups or add, or remove sites from the SharePoint policy. -So, at this point, all of our services are running automated backups. Now, let’s assume that something happened to our Exchange mailboxes that were backed up and we want to recover from our restore point. Now, to simulate that, I’m logged in as Adele. I’m deleting email from the last month and even removing those from the Deleted items folder. One thing to note is that a restore from Exchange will only impact items that were modified, hard-deleted, or purged during the recovery window. So, let’s recover those deleted emails. So, I can start that for Exchange by hitting Restore mailboxes. -Now, for the choose selection method option, there is an option to upload a CSV list of mailboxes or select them individually. I’ll choose that one. And then, I’ll search for Adele and there she is. Now, I’ll add her mailbox and hit Next. Then, in content scope, I can select all emails including notes, contacts, calendars, and tasks, or I can choose a specific timeframe as well as apply filters, as you can see here. I’m going to keep the default of all items. Then, I can choose a time before the event happened to restore too. From there, I’ll be presented with available restore points. Email restore points are created every 10 minutes from when the policy’s active for up to 365 days. And I’ll choose this one for April 4th at 8:40 AM. -Then, for the destination of restored items, I have two primary options. I can replace mailbox items with backups, or the current version of the items will be overwritten by the items recovered from the restore point. Or I can create new mailbox items from backups within the user’s mailbox, which will be named Recovered Items, with the year, month, day, and time. I’ll keep replace mailbox items. Note that only effective items as mentioned will be overwritten. Any items received after the restore point or unmodified items will not be reverted and will also not get copied over if you decide to create a new folder. Once I confirm and commit to the file restore, from there, I can track progress from the Restoration tasks tab in the Microsoft 365 Backup page and see how things are going. So, I’m going to fast forward a little in time. And just to prove it, I’m back in Adele’s mailbox, and you can see that all of the emails that I deleted before have returned. That’s Exchange. -And there are also a few differences when restoring from OneDrive and SharePoint worth pointing out. Now, I’ll start with SharePoint. Here, I can upload a CSV file of site addresses or select them individually. I’ll do that. Now, I can select exactly which sites I want. There we go. Then, in Search for backups, you’ll see that things are a little different compared to Exchange. And again, I need to choose a date closest to the restore event, as well as a time of day. And for the previous two weeks, there are standard restore points captured every 10 minutes. And for a small-scale restore where you want to prioritize speed over the exact restore time, the prioritized backup options shown here will be faster and is recommended. These faster restore points are taken roughly every 24 hours. -One other thing to note here, if you’re doing a bulk restore, for example, to thousands of sites, then the fast restore points are not relevant. If you want to restore beyond two weeks, because these are weekly snapshots, if I choose the most recent date, where I know that my content is safe, the tool will automatically select the closest restore point captured prior to my selected time. And these weekly restore points are also fast restore points too. The other options are similar to what I showed in Exchange, where you can use in-place Restore or also create new sites. Note that content restored to a new location will apply and address suffix of R, followed by the restore number in a numeric sequence for each restore, starting with R0, as you can see with this site’s URL. In this case, you can copy restored items manually from the restored location to the prior location as needed, and in-place restore will mean users recent edits made to sites, files, and metadata since the time of the restore point will be lost. You can find additional backup and restore considerations at aka.ms/M365BackupNotes. -As you saw today, Microsoft 365 Backup doesn’t just let you self-manage your backups, it helps you recover faster. To find out more, checkout aka.ms/M365Backup. And keep watching Mechanics for the latest tech updates, subscribe to our channel, and thanks for watching.NOW ON DEMAND| OneDrive Office Hours | January 2025
Are you ready to connect with OneDrive product makers this month? We’re gearing up for the next call. Are you ready to connect with OneDrive product makers this month? We’re gearing up for the next call. Join the OneDrive product team live each month on our monthly OneDrive Customer Office Hours to hear what's top of mind, get insights into roadmap updates, and dig into a special topic. Each call includes live Q&A where you'll have a chance to ask the OneDrive product team any question about OneDrive - The home of your files. 😎 Use these links to Register and join live: aka.ms/OneDriveOfficeHours. Save the calendar invite so you never miss a call-https://aka.ms/OfficeHoursCalendar Each call is recorded and made available on demand shortly after. Our next call is Wednesday, January 15th, 2025, 8:00am - 9:00am PDT. This month's special topic: “Microsoft 365 Backup" with Brad Gussin, Principal Product Manager on the Microsoft team. Watch now OnDemand! Our goal is to simplify the way you create and access the files you need, get the information you are looking for, and manage your tasks efficiently. We can't wait to share, listen, and engage - monthly! Anyone can join this one-hour webinar to ask us questions, share feedback, and learn more about the features we’re releasing soon and our roadmap. Note: Our monthly public calls are not an official support tool. To open support tickets, go to see Get support for Microsoft 365; distinct support for educators and education customers is available, too. Stay up to date on Microsoft OneDrive adoption on adoption.microsoft.com. Join our community to catch all news and insights from the OneDrive community blog. And follow us on Twitter: @OneDrive. Thank you for your interest in making your voice heard and taking your knowledge and depth of OneDrive to the next level. You can ask questions and provide feedback in the event Comments below and we will do our best to address what we can during the call. 😎 Register and join live: aka.ms/OneDriveOfficeHours. See you there, Rob Nunez (Product Marketing Manager – Microsoft)
Disable incessant nagware popups
I don't know about everyone else, but I am sick and tired of the nagware pop ups in Word, Excel, PowerPoint, Outlook, etc. Every single product harasses me with pop ups trying to tell me "hey, did you know this feature was here?", "you can do this if you click that", "let me hold your hand through using products you've used for decades even though you don't want daddy Microslop to do that". This is a prime example. I keep getting the same ones again and again and again and everything I've read indicates they should only appear once. But they don't. They keep coming back like a psychotic stalker ex who wants alimony even though you were never married. How do I get this nagware to stop?!Microsoft 365 Backup Launches File-Level Restore
The Microsoft 365 Backup solution will soon be able to restore individual files and folders instead of complete sites. That’s a welcome upgrade to restore capabilities to cover situations like the inadvertent deletion of a file. It’s a wonder why Microsoft didn’t make more about this capability when they celebrated SharePoint’s 25th anniversary last week when they discussed departmental billing for Microsoft 365 Backup. https://office365itpros.com/2026/03/11/microsoft-365-backup-file-restore/
