Up and running in two minutes
- Open the Microsoft 365 app you want the assistant in — Word, Excel, PowerPoint, or Outlook.
- On the Home tab, click the Add-ins button, then More Add-ins.
- Search for "Abacus" and install the Abacus AI add-in.
- Sign in with your Abacus.AI account — or create one free.
For IT administrators deploying to an organization.
- On the Microsoft Marketplace listing, click Get it now and follow the steps — or follow below.
- Sign in to the Microsoft 365 admin center.
- Select Show all → Settings → Integrated apps → View more apps or Upload Custom Apps.
- Find the Abacus AI add-in (or upload manifest.xml), choose who gets it, and Deploy.
Admin-deployed add-ins can take 24–72 hours to appear on the ribbon. Users may need to relaunch their Office apps.
For testing and evaluation without the store.
- Download the manifest you need: Word / Excel / PowerPoint — manifest.xml · Outlook — manifest.mail.xml
- Open Office on the web or the desktop app you want to test, and create or open a document.
- Select Home → Add-ins → Advanced → Upload my add-in, then choose the downloaded XML file.
Try your first prompt
PPowerPoint
Build a 10-slide deck on our Q3 results with charts
XExcel
Summarize this sheet and chart the monthly trend
WWord
Summarize this document into a one-page brief
OOutlook
Draft a reply agreeing to the proposal, friendly tone
Stuck? Check the FAQ — or contact support.