Share via

Outlook suddenly lost my contact lists and won't let me create any new ones

Ross, Sharon 20 Reputation points
2026-02-02T20:58:34.4+00:00

All of my contact lists have disappeared on Outlook for web and there is no option to create a new contact list (it is greyed out--see attached). I have to email and send meeting Screenshot 2026-02-02 at 2.56.04 PM

invitations to a group with 50+ people and doing this one-by-one simply is not possible. All that appears under people is "Categories."

Is this something I need to go to our internal IT team about?

Outlook | Web | Outlook on the web for business | Contacts

Answer accepted by question author

  1. Liora D 14,300 Reputation points Microsoft External Staff Moderator
    2026-02-05T14:53:32.58+00:00

    Dear @Ross, Sharon,

    Thank you so much for the additional information, your update is extremely helpful, especially the detail that you can create a Contact List in Outlook Desktop, but not in Outlook Web, and that other colleagues are experiencing the same behavior. This tells us something very important about where the issue is (and where it is not).

    From what you described, the contacts themselves are not lost. They still appear in Outlook Desktop and even in Teams meeting invite suggestions, but they do not appear or sync in Outlook on the Web, and the “New contact list” button is greyed out.

    Because everything still works in Outlook Desktop and the data is intact, this points to a service‑side issue with the web contacts experience, not data loss.

    If multiple people in your organization are affected and the change happened “overnight” as you mentioned, this further confirms that something has changed in the service not in your device or your apps.

    At this stage, the next meaningful step is for your administrator to open a support ticket with Microsoft, so the backend service team can check your tenant directly. Issues with Contacts/OWA People typically require a backend review, and Microsoft Support can see whether your tenant is in the middle of a migration, experiencing a partial service degradation, or needs a repair.

    Your admin can raise support ticket from Microsoft 365 Admin Center>Support>Help & Support.  

    For reference:  Get support | Microsoft Docs   

    User's image

    I truly hope this explanation helps you better understand what’s happening and gives you a clear direction toward resolving it. If my response has helped you better understand the situation and guided you toward a possible next step, please consider marking it as the “Accepted Answer.”

    Doing so will pin the thread to the top, making it easier for others who face the same issue to find your question and benefit from your pioneering effort in raising it. It also helps other users searching with related keywords discover the discussion more quickly.

    Thanks again for bringing such a thoughtful and well‑documented question to the community. Please feel free to share any new updates, I’m here and happy to help.

    0 comments

1 additional answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Liora D 14,300 Reputation points Microsoft External Staff Moderator
    2026-02-03T11:09:45.96+00:00

    Dear @Ross, Sharon,

    Welcome to Microsoft Q&A. 

    Thank you so much for the clear description of the issue and for sharing the screenshot, that really helps understand what you’re seeing.

    I tested this behavior on my own environments (both personal and a few Microsoft 365 business tenants), and I’m not able to reproduce the problem. In all of those environments Contact lists still appear normally in Outlook on the web, and the New contact list option is available.

    To narrow down what’s happening, could you let me know whether the same thing occurs in another place such as the Outlook mobile app or the Outlook desktop app?

    And if any colleagues are experiencing the same issue, that would help determine if this is specific to your mailbox or something broader?

    If this only affects your account, your internal IT team may want to check whether anything changed recently in the organization’s Outlook/Exchange settings, or whether the service is showing any warnings in the Microsoft 365 admin center’s Service Health page. If the problem appears tenant‑wide, they may need to open a backend ticket with Microsoft Support so the service team can check it directly.

    If you need help finding your admin, please see: How do I find my Microsoft 365 admin? - Microsoft Support 

    Please understand that our initial response does not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.  

    Looking forward to hearing back from you with any updates or additional details. 

    Warm regards, 

    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.   

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.