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Add Source365 to Outlook.

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Download manifest.xmlSign in to your account

manifest.xml · ~4 KB · Office Add-in manifest

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Install in under 5 minutes

Install Source365 for your own Outlook account via Outlook on the web. No admin rights required.

🔒 outlook.office.com/mail
Outlook
+
Inbox
Anders L.
Q2 Budget
Sarah C.
Re: Shipping
Klaus W.
Hamburg line
Nordic AB
Invoice #892
Re: parts for the Hamburg line
Klaus Weber · 10:15
···
Hi,
We urgently need the following parts for the Hamburg production line:
Product list
• Steel Bearings SKF-6205 · 5,000 pcs
• Hydraulic Cylinders HY-200 · 200 units
• PTFE Gaskets DN-50 · 10,000 pcs
Please send quotes ASAP. Thanks,
Klaus
Step 1 / 11Open email in Outlook
Requirements
  • Microsoft 365 or Outlook on the web
  • Outlook desktop (Windows/Mac) with Microsoft 365 subscription
  • A Microsoft work, school, or personal account
  • Exchange On-Premises is not supported
Installation guide

Five steps, no admin rights.

Follow these steps to add Source365 to your Outlook. Personal install needs no admin approval.

  1. 01

    Download the manifest file

    Click the button below to download the Source365 manifest file (.xml). This file tells Outlook where to load the add-in from, and it contains no sensitive information.

  2. 02

    Open Outlook and go to Add-ins

    In Outlook on the web (outlook.office.com or outlook.live.com), open any email and click the three-dot menu (⋯) in the toolbar. Select "Get Add-ins" or "Manage Add-ins".

    Using the Outlook desktop app? Go to Home → Get Add-ins in the ribbon.

  3. 03

    Select "My add-ins" and upload

    In the Add-ins dialog, click "My add-ins" in the left sidebar. Scroll down to "Custom add-ins" and click "+ Add a custom add-in" → "Add from file...".

  4. 04

    Select the manifest file

    Choose the manifest.xml file you downloaded in step 1. Outlook will warn you that it's a custom add-in. Click Install to proceed.

  5. 05

    Open Source365 in an email

    Open any procurement inquiry email. You will now see the Source365 icon in the Outlook toolbar. Click it to open the taskpane and sign in with your Microsoft account.

    A free 14-day trial starts automatically after sign-in. No credit card required.

Download manifest.xmlSign in to your account
FAQ

Installation questions.

Something not working? Email our support team.

Can my IT admin deploy this to the whole organisation?
Yes. IT administrators can deploy the manifest centrally via the Microsoft 365 admin center under Settings → Integrated apps → Upload custom apps. This pushes the add-in to all selected users automatically.
Do I need admin rights to install it for myself?
No. Any Microsoft 365 user can add a custom add-in for their own account via Outlook on the web without requiring admin approval.
Will I lose my settings if I reinstall?
No. Your account, search history, and settings are stored in Source365's cloud, not in the add-in itself. Reinstalling or updating the manifest won't affect your data.
Does this work in Outlook on mobile?
Source365 is currently optimised for Outlook on the web and the Outlook desktop app. Mobile support is on our roadmap.
How do I update to a newer version?
Updates are delivered automatically through the taskpane, so you don't need to reinstall the manifest unless we release a new major version.
I don't see the Source365 icon after installing. What should I do?
Try opening a message (not the compose window). The add-in only activates in read mode. If it still doesn't appear, close and reopen Outlook, then check under "My add-ins" to verify the installation succeeded.

Ready to source smarter?

Install the add-in and sign in to start your free 14-day trial. No credit card required.

Download manifest.xmlView pricing