Microsoft 365 Cancellation Survival: How to Move to Perpetual Office

Microsoft 365 will keep your apps working for a short window after cancellation, then move everything to read-only mode. Your OneDrive files become inaccessible after 30 days if you’re above the free 5GB tier. Your email history stays in Outlook — but only if you’ve exported it first. Do these things in the right order and the transition is clean. Skip them and you lose access to things you’ll want.

What stops working and when

The most important thing to understand before touching anything is the cancellation timeline. Microsoft doesn’t cut you off instantly — but the grace periods are shorter than most people expect.

Step 1 — buy your perpetual licence before cancelling

Do this first, before you touch the 365 cancellation. The reason is simple: you want to install and confirm perpetual Office is working while you still have an active 365 account and a clean Microsoft account session. A brief overlap period — a day or two — eliminates any risk of being without working Office apps.

Which licence to buy

This guide covers Office Home & Business 2024 — available for both PC and Mac. It activates via setup.microsoft.com using your Microsoft account, which is the quickest and most familiar route for anyone coming off a Microsoft 365 consumer subscription. No deployment tools, no command line — just a standard installer.

Step 2 — secure your OneDrive files

Before cancelling, make sure everything in OneDrive that you need is available locally on your machine. There are two approaches depending on how you’ve been using OneDrive.

If you use OneDrive desktop sync (the most common setup)

Your files are already mirrored on your PC — but you need to confirm that sync is complete and that no files are cloud-only. Look at the OneDrive icon in the system tray. A cloud icon on any file or folder means it’s online-only and not yet downloaded to your machine.

1. Check the OneDrive sync status

   Click the OneDrive icon in the taskbar system tray. It should show “Up to date.” If it shows pending syncs or errors, resolve those first.
2. Make online-only files available offline

   In File Explorer, right-click any folder showing a cloud icon and select Always keep on this device. Do this for every folder you want to keep. Wait for the sync to complete — the cloud icon will change to a green tick.
3. Verify the local copies exist

   Navigate to your OneDrive folder in File Explorer. Every file should show a green tick (synced locally). No cloud icons should remain for files you care about.

   Default location: C:\Users\[YourName]\OneDrive

If you work directly in the browser (onedrive.live.com)

Download your files before cancelling. Go to onedrive.live.com, select the folders you need, and use the Download option to save them as a zip file to your local drive. Do this for each folder — there is no single “download everything” button for large accounts, so work through it folder by folder.

Step 3 — export your Outlook email and calendar

This is the step most people skip and then regret. Perpetual Outlook connects to all the same email accounts as M365 Outlook — your Gmail, your domain email, your personal Microsoft account — and those accounts sync normally. What doesn’t transfer automatically is your email history if it only exists in an Exchange or Microsoft 365 mailbox.

If you use a standard IMAP email account (Gmail, domain email via IMAP), your mail is stored on the mail server — connecting the same account in perpetual Outlook will pull everything down automatically. You only need to export if your email is stored in a Microsoft 365 Exchange mailbox.

Export a PST file (Exchange / M365 mailbox)

1. Open Outlook → File → Open & Export → Import/Export

   This opens the Import and Export Wizard. Select Export to a file and click Next.
2. Choose Outlook Data File (.pst)

   Select this option and click Next. This creates a portable file containing your selected email data.
3. Select the folders to export

   Select your inbox at the top level — this includes all subfolders. Tick Include subfolders. Click Next.
4. Save to a local drive location

   Choose a local drive location — not OneDrive — and give the file a clear name. Click Finish. For large mailboxes this can take several minutes.

   Save to: C:\Users\[YourName]\Documents\OutlookBackup.pst

Export calendar and contacts

Use the same Import/Export route to export your Calendar and Contacts folders as separate PST files if you want a backup. In practice, if you connect perpetual Outlook to the same Microsoft account, your calendar and contacts sync back automatically — but having a local export costs nothing and removes uncertainty.

Importing the PST into perpetual Outlook

Once perpetual Outlook is installed and your email account is connected: File → Open & Export → Import/Export → Import from another program or file → Outlook Data File (.pst). Select your saved PST and import. Your historical email appears in Outlook alongside any new mail from your live account.

Step 4 — uninstall Microsoft 365, then install Office H&B 2024

This is the most important sequence to get right. You must uninstall Microsoft 365 before installing Office Home & Business 2024 — not after. If you install perpetual Office while 365 is still present, the machine can revert to activating against the 365 licence rather than your new perpetual key. Uninstall first, then install clean.

Uninstall Microsoft 365

1. Settings → Apps → Installed apps

   Search for “Microsoft 365” or “Microsoft Office.” Select the entry and click Uninstall. On Mac: open Finder → Applications, drag Microsoft Word (or any Office app) to Trash, then run Microsoft’s removal tool from support.microsoft.com to clean up all components.
2. Run the Microsoft Support and Recovery Assistant (Windows)

   For a thorough removal on Windows, Microsoft’s free Support and Recovery Assistant (aka SaRA) removes all Office components cleanly — including registry entries that can cause perpetual Office to revert to 365 activation. Download from aka.ms/SaRA-OfficeUninstall. Run it, select “Uninstall Office,” follow the prompts.

   Recommended — prevents activation conflicts
3. Restart the machine

   Always restart after uninstalling Office before installing a new version. This clears any residual processes and ensures the installer starts with a clean slate.

Install Office Home & Business 2024

1. Go to setup.microsoft.com and sign in

   Use the Microsoft account you’ll continue using for Outlook and OneDrive. Enter your 25-character product key when prompted. The licence is now permanently attached to this account.
2. Download and run the installer

   The portal detects your platform and provides the correct installer. Run the downloaded file — Office downloads and installs in the background. Allow 15–20 minutes on a standard broadband connection.

   The installer file is small — the full Office download happens during setup
3. Sign in when Office opens

   Open Word or Excel. You’ll be prompted to sign in. Use the same Microsoft account used at setup.microsoft.com. Office activates automatically against your redeemed perpetual key.
4. Confirm activation

   File → Account → Product Information should show Product Activated. Open a document, make an edit, save it. If everything works, you’re ready to cancel 365.

Step 5 — cancel Microsoft 365

With perpetual Office installed and confirmed working, your files secured locally, and your email exported, you’re ready to cancel.

1. Go to account.microsoft.com

   Sign in with the Microsoft account your 365 subscription is billed to.
2. Services & Subscriptions → find your plan → Manage

   Click Cancel subscription. Follow the cancellation flow — Microsoft will present retention offers. Decline them and confirm.
3. Note the billing period end date

   Microsoft shows you the date access continues until. Make a note — this is when apps move to read-only mode and the 30-day OneDrive grace period starts.

Step 6 — after cancellation: finish the migration

1. Import your PST into perpetual Outlook

   If you exported a PST in Step 3, import it now: File → Open & Export → Import/Export → Import from another program or file → Outlook Data File (.pst). Select your file. Your email history appears alongside new mail from your live account.
2. Verify your files are accessible

   Open several files from the OneDrive folder you secured locally. Confirm they open in the perpetual Office apps without any licensing or access warnings.
3. Decide on cloud storage going forward

   OneDrive drops to 5GB free once the grace period ends. If you want continued cloud backup, set up a standalone OneDrive plan, use an alternative like Google Drive or Dropbox, or rely on local backup. The 5GB free tier is adequate for documents if your files aren’t large.

What you’ll genuinely lose — honest account

Perpetual Office replaces everything most people use 365 for day to day. A handful of things don’t have direct equivalents — worth being clear about before you cancel.

For most people doing standard document, spreadsheet, email, and presentation work, none of the above matters day to day. The Office 2024 vs Microsoft 365 comparison covers the full trade-off if you want to work through it in detail.

The replacement licences

Common questions