Outlook AI Assistant: Cassie Handles the Microsoft Inbox
Cassie sends and replies from your Outlook mailbox
Inbox search by sender, date, or subject in one chat
Daily Summarizer pulls Outlook plus your calendar each morning
Trusted by over 50,000+ business owners and founders
How Cassie works with Outlook
She reads the messages, drafts what you want sent, and ships through your Microsoft account. The same chat handles search, reply, and follow-up.
Hook Outlook into Cassie
Open Cassie in Sintra and pick Outlook from her integration list. Sign in with your Microsoft account and approve the scopes she needs to read and send.
Ask her like a person
Yesterday's emails from vendors.' 'Draft a reply to the latest message from Anna.' 'Find the proposal Mark sent last week.' Cassie pulls from your Outlook mailbox and shows what she found.
Review the draft and send
Cassie writes the reply. You skim, change a sentence, tell her to send. The message goes out through your Outlook account with a confirmation back in chat.
Who benefits from using Outlook AI Assistant
Microsoft-first teams who want AI inbox help without leaving the Microsoft stack.
Sintra vs other Outlook AI tools
Outlook AI tools often focus on email writing, summaries, and scheduling. Sintra adds broader execution by connecting inbox activity with tasks, follow-ups, CRM-style work, and business planning.
Data-Backed Results From Real Users
+37%
Revenue growth in the first 90 days
5x
Faster content production across all channels
20h
Saved weekly on admin, support, and content work
80%
Of repetitive tasks fully automated
Set up Outlook with Sintra
Open Cassie
Cassie is the email helper in Sintra. Her chat hosts both Gmail and Outlook integrations.
Sign in with Microsoft
Click the Outlook connection inside Cassie. Sign in with the Microsoft account holding the mailbox you want her to manage. Approve mail read and send permissions.
Confirm admin permissions if needed
Work and school Microsoft accounts may require an admin to approve Sintra. If sign-in shows a consent block, ask your admin or check Sintra's help center for guidance.
Send a test message
Ask Cassie to draft a quick email and send it through your Outlook account. Watch for the confirmation. Cc and Bcc work the same as in Gmail.
Used by more than
50,000+ founders.
I can’t recommend SintraAI enough. It’s like having a personal business coach 24/7, mapping out steps to grow my company and clarifying my priorities. I feel a renewed sense of focus and control every day.
December 29, 2024 • Socrate Concepcion • US
Each AI bot tackles my to-do list, from scheduling tasks to crawling my website for SEO tips. I love how it set up calendar reminders for all my commitments. Sintra.ai is well worth every penny, especially for a busy single-person business.
December 14, 2024 • Jennifer Glenn • US
As an entrepreneur launching a new venture, Sintra.ai has made a real difference. The AI assistants are like personal staff I can rely on. And whenever I needed support, the team was on point. A must-try for any budding business!
December 21, 2024 • Custódio Barreiros • HU
I once had a large team, and although I loved my helpers, they needed constant motivation. With Sintra, there’s no drama, just new ideas that I can simply accept or reject. It’s a huge relief—100% recommended.
December 26, 2024 • Holly Wehde • US
Hiring Sintra was a great decision for my struggling boutique. They handle social media posts, guide my ads, and even offered a solution for double social media pages. Now I can focus on my inventory and customers.
December 17, 2024 • Michele Davis • US
Signed up for Sintra X—it felt overwhelming at first, but once it understood how I think, it turned into a creative powerhouse. Support is top-notch, and the daily integrations impress me.
Dec 10, 2024 • Sami Liftoff • US
I’m not usually one to give top marks, but once I got comfortable with Sintra’s 12 helpers, I was blown away by their efficiency. They churn out so many analytical ideas I have to pause and digest them. It’s sometimes overwhelming, but in a good way.
December 29, 2024 • lars • DK
Sintra integrates with all my favorite tools and these little helpers automate my tasks in a huge way. They actually learn my company’s style day by day. It’s a massive step up from generic AI chats.
December 30, 2024 • Michelangelo • IT
My life is simpler with Sintra. It handles content creation, next steps, brainstorming, and copy. I highly recommend it if you want to free up mental space for what truly matters in your business.
December 28, 2024 • Lionel D'Alvia • US
My “team” in Sintra knocks out tasks like magic, offering fresh ideas for efficiency and better customer outreach. It’s a relief knowing I have AI assistants ready to go around the clock.
December 31, 2024 • Kat Angelica • US
I’ve only been using Sintra for a couple of weeks, but the experience has been great—especially with the social media bot reaching out to me with new ideas. The pull model feels super proactive and makes me more confident in my daily tasks.
December 30, 2024 • Bayan Qandil • US
I challenge anyone to compare other platforms to Sintra.ai and their staff—you won’t find a better customer experience. Everyone is professional, responsive, and genuinely cares about helping. Truly top-notch!
December 28, 2024 • Timothy Montjoy • US
This platform helps me like a full-time employee would. As a startup, I can’t afford extra staff, so Sintra stepped in to handle complex tasks and free me up for big-picture thinking.
December 28, 2024 • Jules Kincaid • US
I’m juggling multiple hats in my business, and these 12 AI “helpers” lighten the load. They even crack jokes and celebrate milestones with me! I saved thousands in consultant fees by letting Sintra handle SEO and content tasks.
December 30, 2024 • Michelle Smith • US
This platform helps me like a full-time employee would. As a startup, I can’t afford extra staff, so Sintra stepped in to handle complex tasks and free me up for big-picture thinking.
December 24, 2024 • Domanic R.H • US
More integrations Sintra offers
Hire your Outlook AI assistant
Get Sintra X today. Hand Outlook to Cassie and the inbox stops being your morning. 14-day money-back guarantee.
Frequenly asked questions
It reads your Outlook mailbox, drafts replies in your voice, and sends through your Microsoft account. In Sintra, Cassie owns Outlook. The flow is chat-first.
Work or school accounts have the widest API support. Personal Microsoft accounts may have narrower scope. Sign in with the account that matches how you actually work.
Cassie needs Outlook mail read and send scopes on the Microsoft account you sign in with. Approve them on the Microsoft consent screen. Work and school accounts may need admin approval first.
Some Microsoft 365 organizations require admin consent for third-party apps. If your sign-in is blocked, send your admin Sintra's help-center guide on Microsoft access.
Check that Outlook is still connected in Cassie's settings. If the Microsoft sign-in expired, reauthorize. For send failures inside a specific tenant, your admin may need to allow Sintra again.
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