Prefill email address

Moody, Dempsey 0 Reputation points
2026-09-10T21:31:35.6233333+00:00

In outlook, when I begin an email the incorrect email address prefills in the "To:" line. The recipient has multiple emails associated with their outlook profile. Can we change the order of emails listed in his profile to change the prefill when a sender types an address?

Outlook | Windows | Classic Outlook for Windows | For business
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  1. AI answer

    2026-09-10T21:31:47.6233333+00:00

    Yes. In classic Outlook, the address list search order can be changed, and that affects which address lists Outlook checks first when resolving recipients.

    To change it manually:

    1. In Outlook, go to Home > Address Book.
    2. Select Tools > Options.
    3. Under When opening the address book, show this address list first, choose the default address book if needed.
    4. To change lookup order, select Custom.
    5. Use the up and down arrows to reorder the address books.
    6. Select OK.

    Important: this changes the order of address lists/address books that Outlook checks first. The provided documentation does not state that Outlook can reorder multiple email addresses within a single person’s profile/contact card to control which one prefills in the To: field.

    For classic Outlook in business environments, administrators can also set the address list resolution order programmatically by using MAPI IAddrBook::SetSearchPath.

    References:

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  2. Jay1 Tran 600 Reputation points Independent Advisor
    2026-09-10T22:17:02.9366667+00:00

    Hi Dempsey,

    Thank you for reaching out.

    Changing the order of the email addresses in the recipient’s profile generally will not control which address Outlook prefills. Outlook may use previously entered recipients, saved contacts, or your organization’s address directory when displaying suggestions.

    To resolve the issue, please try the following steps:

    1. Remove the incorrect suggestion
    • Click New Email to open a blank message. This does not create a new email address.
    • Begin typing the recipient’s name in the To field.
    • When the incorrect address appears, click the X next to it, or highlight it and press Delete.
    • Enter and select the correct email address.
    1. Check the sender’s Outlook contacts
    • Open People in Outlook and search for the recipient.
    • Check for an outdated or duplicate contact containing the incorrect address.
    • Edit the incorrect contact, save the changes, and then try again.

    User's image

    1. Verify the recipient’s primary email address

    If the issue affects multiple senders, please reach out to your IT admin to confirm that the preferred address is configured as the recipient’s primary email address. The other addresses can remain as aliases, but changing their displayed order will not establish which address is primary.

    In case you do not know who is your IT admin, kindly refer to this article: How do I find my Microsoft 365 admin? - Microsoft Support  

    I hope your issue gets resolved soon. Any updates would be greatly appreciated.

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