How to Connect Multiple Outlook Accounts to Grok
Grok’s Outlook connector is explicit that it reaches one mailbox: the signed-in user’s. Carly holds each Microsoft identity as its own connection and exposes them to Grok through a single custom connector, so one conversation can search or act across all of them. The same Carly account holds your Gmail inboxes and every calendar on both sides, so you set this up once for all of it.
1. Add your Outlook accounts to Carly
- Sign in at carlyassistant.com.
- Open carlyassistant.com/integrations.
- Find Outlook, click Connect, and authorize the account.
- Click Connect again for the next one, and keep going for as many accounts as you want.
Repeat for each additional tenant, using a private window if Microsoft preselects the previous login. Verify the full address after every authorization before adding the next.
Tenants approve independently, so one company’s administrator declining does not affect the others. Carly also accepts personal Outlook.com addresses, which covers the case Grok’s own connector excludes.
Carly connects to thousands of apps, so while you are on that page you can add your calendars, files, CRM, and anything else you want Grok to reach through the same connector.
2. Add Carly to Grok
- Go to grok.com/connectors.
- Click New Connector, then select Custom.
- Enter
https://carlyassistant.com/mcp/. - Complete the authentication step.
- Sign in to the Carly account holding the mailboxes.
xAI launched Grok Connectors in May 2026 across web, iOS, and Android, and connectors are available to all Grok users. In Business and Enterprise workspaces a team administrator must provision the connector in the cloud console before members can use it, so check there first if the option is greyed out.
Grok’s Outlook connector is capable but single-tenant
xAI’s connector documentation covers a real working surface. On mail, Grok can search with keyword and filter queries, read full messages including body, headers, and attachments, manage drafts with To, Cc, Bcc, and HTML bodies, send, reply-all, forward, and organize mail by moving messages between folders and creating folders. On calendar it can search events, view details, check availability across attendees, create and update events, and RSVP. The scopes behind that are Mail.ReadWrite, Mail.Send, and Calendars.ReadWrite.
Grok closed part of the event gap in July 2026. Scheduled automations are open to everyone and email triggers come with SuperGrok, matching on sender, recipient, or subject. The limit is that the inbox is the only thing it watches, so anything happening in another app still has to be noticed by a person first. Carly notices instead, across thousands of apps.
Native Outlook connector versus Carly in Grok
| Need | Native Outlook connector | Carly connector |
|---|---|---|
| Search one work mailbox | Yes | Yes |
| Hold several independent logins at once | No, documented as the signed-in user only | Yes |
| Reach a personal Outlook.com address | No, work or school accounts only | Yes |
| Compare mailboxes from two tenants | No | Yes |
| Send, reply-all, and forward | Yes | Yes |
| Act on an event without you present | Email triggers only, on SuperGrok | Yes |
| Run the same routing outside Grok | No | Yes |
Carly turns several Outlook logins into one addressable toolset for Grok, and the routing keeps running after the conversation ends. Carly offers free Zapier-style workflows; AI agents start at $35/month.
Quick fixes when a mailbox does not appear
| Problem | Fix |
|---|---|
| A personal Outlook.com address is rejected | Expected in Grok’s native connector; connect it to Carly instead |
| A tenant blocks authorization | Ask that tenant’s Microsoft 365 administrator to approve Carly |
| Connector options are greyed out | Ask the Grok workspace admin to provision connectors in the cloud console |
| Microsoft connected the same mailbox twice | Remove the duplicate and reconnect from a private window |
| Grok queries the wrong mailbox | Use the full address and require source attribution |
Frequently asked questions
Can Grok connect two Outlook accounts natively?
No. xAI’s documentation states that Grok can access only the mailbox of the signed-in user. Carly is the way to make several authorized mailboxes reachable in one conversation.
Does Grok’s Outlook connector work with a personal Outlook.com address?
Not natively; the connector covers Microsoft work or school accounts. Connect a personal address through Carly if you need it in the same conversation.
Can a Grok automation act on the right mailbox on its own?
Grok’s triggers fire on incoming email, and xAI does not document which inbox is watched when several exist. Route account-specific automation through Carly instead.
Related: Multiple Gmail accounts in Grok · Grok alternatives · Multiple Outlook accounts in Copilot · Manage multiple email accounts with AI · Carly’s Outlook integration
Ready to automate your busywork?
Carly schedules, researches, and briefs you—so you can focus on what matters.
See what people say
"Before Carly, I relied on a Calendly link, but the whole process felt impersonal and not very professional. Carly changed that by handling all the back-and-forth, so I'm no longer stuck in endless email threads trying to line up schedules.
Now Carly reaches out to candidates, shares my real-time availability, lets them pick a slot, then sends a Zoom link and drops it straight into my calendar. She sends reminders to both of us before each call, which has significantly reduced no-shows and last-minute confusion.
On top of scheduling, Carly acts like a full executive assistant, sending me my schedule the night before so I can prepare for each call. It reminds me of the old x.ai assistant, but Carly is noticeably smarter, faster, and better suited to my healthcare recruitment business."
