Using New Outlook on Windows for professional communication and productivity
Welcome to Microsoft Q&A forum.
Thank you for reaching out and sharing details regarding your question with Copilot in New Outlook.
According to your concern, by default, Microsoft 365 Copilot is only supported on primary mailboxes that are hosted on Exchange Online. If you were able to use Copilot in Outlook with your IMAP, and the Copilot option disappeared recently, could be due to your Outlook profile making IMAP the primary mailbox, a license or identity change, client updates or policies enforcing Exchange Online, or admins disabling Copilot or related features.
To resolve the issue, please follow these steps:
- Add or switch to an Exchange Online mailbox as your primary account in Outlook.
- In New Outlook, select the Gear icon on the top.
- Select Account > Your accounts > Add accounts.
- Ensure your Copilot license is active and associated with that account.
- Sign into My account, select Subscriptions on the left pane.
- Verify if Copilot license is available.
- Check organizational policies
If you’re in a managed environment, confirm with your organization's IT admin that Copilot or connected experiences haven’t been disabled via Entra Conditional Access.
- Test in Outlook on the web
Log in to Outlook on the web with your Exchange Online account. If Copilot appears there, the issue is likely client-specific.
I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this.
Thank you for your patience and your understanding. If you have any questions or need further assistance, please feel free to share them in the comments on this post so I can continue to support you.
I look forward to continuing the conversation.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.