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Installing ExtendSync Preview For Outlook

How to sideload a preview (early access) build

Updated this week

Overview

From time to time, CloudExtend may offer a Preview version of ExtendSync for Outlook. Preview builds provide early access to new features and allow customers to share feedback before those features are released to production.

Preview versions are time-limited and intended for evaluation only.

Important
Before installing a preview build, check with your administrator.
Your admin may prefer to:

  • Deploy the preview centrally from Microsoft 365, or

  • Restrict preview installs in your organization


Before You Begin

  • Preview builds replace the production version

  • You can reinstall the production version at any time from the Microsoft Office Store

  • The Preview version will expire when we launch the next production build.


Installing the Preview Version

Installing the preview version requires two steps:

  1. Remove the current production version

  2. Install the preview build

Step 1: Remove the Production Version

Removing the production version ensures there are no conflicts.

  1. In Outlook, click Get Add-Ins from the Home tab

    • In Outlook on the web (OWA), click the three dots (…) on any email and scroll to Get Add-Ins

  2. Select My Add-Ins

  3. Locate ExtendSync

  4. Click (ellipsis) on the add-in tile and select Remove

💡 Note

You can reinstall the production version later from the Office Store.

Step 2: Install the Preview Version

  1. Click Get Add-Ins again

  2. Select My Add-Ins

  3. Scroll to Add a custom add-in

  4. Choose Add from URL

  5. Paste the Preview Manifest URL when prompted

  6. Confirm the installation when prompted

💡 Note
The preview URL will be provided by CloudExtend when a preview program is active.


✅ You’re All Set

Once installed, you are now running the ExtendSync Preview version.

You may see preview-specific indicators or messaging inside the app.


Removing the Preview Version

Preview builds are temporary. When a new production version is released:

  • You’ll see an in-app notification indicating the preview has expired

  • The preview version must be removed and replaced with the production build

To remove the preview version:

  1. Follow the same steps used to remove the production version

  2. Select the Preview add-in instead

  3. Reinstall the production version from the Microsoft Office Store


Providing Feedback

We encourage feedback during preview periods.

You can share feedback using any of the following:

Please include:

  • What feature you tested

  • Expected vs actual behavior

  • Screenshots (if applicable)

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