Are you looking to disconnect the link between Microsoft and Google accounts? Whether you previously connected Outlook with Gmail, synced Microsoft To Do with Google Calendar, or linked Office 365 to Google Workspace, there may come a time when you want to separate both ecosystems.

Many users connect Microsoft and Google services for collaboration, but later face syncing errors, duplicate data, security concerns, or migration requirements. In this guide, you’ll learn: Why users link Microsoft and Google accounts, Common reasons to disconnect them, How to remove Microsoft from Google account access, How to unlink Google from Microsoft account, How to stop Outlook–Gmail sync, and What to do if you’re permanently moving from Microsoft 365 to Google Workspace

Why Are Microsoft and Google Accounts Linked?

Microsoft and Google offer powerful productivity ecosystems:

  • Microsoft 365: Outlook, OneDrive, SharePoint Online, Teams, To Do
  • Google Workspace: Gmail, Google Drive, Calendar, Contacts, Meet

Users often connect them to:

  • Sync Outlook emails with Gmail
  • Link Microsoft To Do to Google Calendar
  • Access Gmail in Outlook
  • Use Google Drive inside Microsoft apps
  • Sign in to third-party apps via Google or Microsoft

While this integration is useful, it can sometimes cause confusion, syncing delays, or data duplication.

Why Disconnect the Link Between Microsoft and Google?

Here are common reasons users search for how to disconnect Microsoft from Google:

  • Many businesses migrate from Microsoft 365 to Google Workspace (or vice versa). Once migration is complete, syncing is no longer required.
  • Users often face: Duplicate calendar entries, Repeated contacts, Email sync delays, and Task synchronization issues
  • If you previously granted account access permissions, you may want to revoke them to enhance security.
  • Companies sometimes standardize on one platform and require unlinking personal or external accounts.

How to Disconnect Microsoft from Google Account?

If you connected Microsoft apps to your Google account, follow these steps:

Method 1: Remove Microsoft from Google Account Permissions

  1. Sign in to your Google Account.
  2. Go to Security.
  3. Scroll to “Your connections to third-party apps & services.”
  4. Click See all connections.
  5. Select Microsoft or a related app.
  6. Click Remove Access.

This revokes permission for Microsoft services to access your Google data.

Method 2: Remove Gmail from Outlook

  1. Open Outlook Desktop.
  2. Go to File > Account Settings > Account Settings.
  3. Select your Gmail account.
  4. Click Remove.

For Outlook Web:

  1. Go to Settings > Mail > Sync email.
  2. Remove the connected Google account.

How to Stop Calendar Sync Between Outlook and Google?

If your Outlook calendar is syncing with Google Calendar:

  1. Remove subscribed internet calendars (ICS links)
  2. Delete sync tools (third-party apps)
  3. Disable calendar sharing permissions

In Google Calendar:

  1. Go to Settings.
  2. Click the connected Outlook calendar.
  3. Remove or unsubscribe.

How to Disconnect Microsoft To Do from Google Calendar?

If you linked Microsoft To Do with Google Calendar:

  1. Open Microsoft To Do.
  2. Check if Google account is connected via settings.
  3. Remove calendar publishing link.
  4. Delete shared ICS subscription from Google Calendar.

Completely Separating Microsoft 365 and Google Workspace. If you are permanently switching ecosystems, simply disconnecting accounts is not enough. You must:

  • Migrate emails
  • Transfer contacts
  • Move calendars
  • Export files from OneDrive
  • Transfer SharePoint data

After data migration, you can safely disconnect both platforms.

What If You Are Moving from Microsoft 365 to Google Workspace?

Many businesses disconnect Microsoft from Google because they are migrating fully to Google Workspace. However, manual methods like IMAP sync or export/import can cause:

  • Data loss
  • Folder structure damage
  • Missing metadata
  • No incremental migration
  • No bulk user migration

This is where a professional solution becomes important.

Professional Way to Migrate Before Disconnecting

Before removing the link between Microsoft and Google, ensure all your Microsoft 365 mailbox data is safely transferred.

If your goal is to move Exchange Online mailboxes to Gmail or Google Workspace, using a dedicated solution. A specialized SysTools software for Office 365 to G Suite Migration can help perform structured migration without technical complexity.

Instead of syncing accounts temporarily, this method enables a clean transition — allowing you to fully disconnect Microsoft after migration.

Common Issues While Disconnecting Accounts

  • Clear cached credentials and remove app passwords.
  • Manually delete subscribed ICS calendars.
  • Remove profile and recreate Outlook data file.
  • Check admin-level permissions in both ecosystems.
Security Tips When Disconnecting Microsoft and Google
  • Revoke OAuth permissions
  • Change passwords
  • Enable 2FA on both platforms
  • Review third-party app access
  • Remove unused app passwords

Disconnecting is not just about unlinking — it’s also about securing your digital environment.

Final Thoughts

Connecting Microsoft and Google services can improve productivity — but sometimes separation becomes necessary. It’s important to disconnect accounts properly to avoid data duplication or loss.

If your goal is a complete transition rather than temporary sync removal, consider using a reliable software. It ensures safe mailbox transfer and allows you to disconnect Microsoft from Google confidently and permanently.

By following the steps above, you can safely remove links, secure your accounts, and maintain full control over your data ecosystem.