Most Australian businesses do not run on Google. They run on Microsoft 365, with Outlook for email, Teams for chat, and SharePoint or OneDrive holding the files. So the first question owners ask about Claude Cowork is a practical one: will it work with our Microsoft stack? The honest answer in 2026 is a mix of yes, partly, and not yet. This guide sets out what Claude Cowork does with Outlook and Microsoft 365 today, where the real gaps sit, and how to get value now without waiting for a perfect integration.
What connects to Microsoft 365 today
Claude Cowork works two ways: through connectors to online services, and through direct access to files in a folder on your computer. Its most mature native connectors today are Google based, but that does not shut a Microsoft business out. There are three practical routes in, and most Sydney firms use all three depending on the job:
Direct file access. Point Cowork at a synced OneDrive or SharePoint folder on the machine it runs on, and it reads and writes those files like any local folder. This is the quietest and most reliable Microsoft surface right now.
Outlook on the web through the browser tools. Cowork can open Outlook in a controlled browser session to read a thread, prepare a reply, or check the calendar, with you approving anything before it sends.
Paste and forward. For one-off work, forwarding an email or pasting a thread straight into Cowork still gets the task done with no connector at all.
None of these asks your IT team to install anything unusual, and none of them moves your mailbox or your files somewhere new. The OneDrive route in particular behaves exactly like ordinary file work, because to Cowork that is all it is.
Outlook email: what actually works
Outlook is where the questions concentrate, so it is worth being precise. Today Cowork does not have the same one-click Outlook email connector it has for Gmail. That sounds like a hard limit, but the workflows that save the most time still land cleanly:
Drafting replies. Forward or paste a thread and Cowork writes a reply in your voice, formatted and ready for you to send from Outlook.
Triage and summaries. Paste a long thread or a busy run of messages and get a short brief with the decisions, the open questions, and the actions pulled out.
Browser-driven review. For live inbox work, Cowork can drive Outlook on the web to read and draft, one item at a time, under your eye.
The boundary to hold is sending. Cowork drafts; a person sends. That is a deliberate control, not a missing feature, and it matters more in Outlook shops that handle client money or personal information under the Privacy Act. Keeping a human on the send button is exactly the posture an Australian business wants when an agent is near a client mailbox.
Calendar, Teams, files and the rest of the stack
Beyond email, the picture across Microsoft 365 is uneven but usable:
Calendar. Through the browser, Cowork can read your Outlook calendar to prep a day or find a free slot. Actual booking still runs through your normal scheduling link.
Teams. There is no native Teams connector yet, so chat history has to be pasted or exported for Cowork to work with it.
SharePoint and OneDrive. The sync-a-folder route makes these the most dependable Microsoft integration Cowork has today.
Word and Excel. Cowork reads and writes .docx and .xlsx files directly, so document and spreadsheet work is fully supported once the file sits in a folder it can see.
Read that list as a map, not a verdict. The heavy, repetitive work in a Microsoft business is email drafting, meeting prep, file tidying, and turning documents around. All of that is available now.
A realistic setup for an Australian Microsoft 365 business
For a Sydney firm of ten people running on Microsoft 365, a setup that works from the first week looks like this:
Sync one SharePoint library or OneDrive folder to the machine running Cowork, and give Cowork access to just that folder.
Keep Outlook to draft-and-review: paste or forward threads, let Cowork write the reply, and send it yourself.
Use the browser tools for calendar prep and the occasional live inbox triage.
Put recurring jobs, such as a Monday brief or a month-end file check, on a scheduled task so they run without being asked.
The value does not depend on a native Outlook button. A single office manager who reclaims six hours a week on email drafting, meeting prep, and file admin is worth roughly $40,000 a year in freed time at Australian salary rates. A one-off setup in the $3,000 to $5,000 range pays for itself inside a quarter on that maths alone, and the paste-and-forward workflows cost nothing extra to run once they are in place.
What to do while native Microsoft support matures
Tighter native Microsoft connectors are the clear direction of travel, and the browser and file routes will keep getting better underneath them. The mistake is to wait for the finished version. The workflows that give the most time back, drafting, triage, summarising, and document work, are here today and will not change when a native Outlook connector arrives. A team that starts now builds the habits and the skill library first, then switches to the closer connector the day it lands, with nothing to relearn.
If your business runs on Outlook and Microsoft 365 and you want a setup built around what exists today, we can map it in a short session and show you the Outlook and OneDrive workflows worth starting with. Book a brainstorm and we will point you at the first three jobs to hand over.
