Logging into my Outlook email account on my iphone app

Sheri Vazquez 0 Reputation points
2026-10-29T02:08:38.6333333+00:00

I utilized tech support to set up my work email in Outlook today and she had to go through IMAP.

The app is requesting my IMAP hostname, IMAP port, port security, and my SMTP outgoing mail server; SMTP hostname, and port and port security. I took a screenshot of my computer as my email was being set up, but didn't take a photo of the IMAP port, SMTP port, or which port securities. I cannot seem to locate the details in my account online. Can you help?

Outlook | Outlook for mobile | Outlook for iOS | For business
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  1. AI answer

    2026-10-29T02:10:47.77+00:00

    Enter the provider-specific settings for the hostnames shown during setup: IMAP port 993 with SSL/TLS, and SMTP port 587 with TLS/STARTTLS.^1^

    Settings to enter

    Outlook field Value
    IMAP hostname imap.us.exg7.exghost.com
    IMAP port 993
    IMAP port security SSL/TLS
    IMAP username Your complete work email address
    IMAP password Your work email password
    SMTP hostname smtp.us.exg7.exghost.com
    SMTP port 587
    SMTP port security TLS or STARTTLS
    SMTP authentication Required
    SMTP username/password Same complete email address and password as IMAP

    These settings come from the provider page associated with those exact exghost.com hostnames; it is not a Microsoft-operated site, so your employer’s IT administrator remains the authoritative source for any organization-specific authentication requirements.^1^

    Enter them in Outlook for iPhone

    1. Open Outlook.
    2. Tap your profile picture, then Settings.
    3. Select Accounts → Add Account → Email Account.
    4. Enter your work email address and tap Add Account.
    5. If Outlook asks for the provider, select IMAP.
    6. Enter your password and enable Use Advanced Settings.
    7. Enter the incoming and outgoing values listed above, then tap Sign In.^2^

    If Outlook requires the port within the hostname field instead of providing a separate port field, enter:

    • imap.us.exg7.exghost.com:993
    • smtp.us.exg7.exghost.com:587

    Microsoft documents this hostname:port format for Outlook mobile’s Advanced Settings.^3^

    If sign-in fails

    Contact the work email administrator rather than substituting generic Microsoft 365 server names. Ask them to confirm:

    • IMAP access is enabled for your mailbox.
    • SMTP authentication is permitted.
    • Whether your account requires an app-specific password or another authentication method.
    • Whether the account should instead be added as a Microsoft 365/Exchange account.

    Manual IMAP setup synchronizes email only, not the mailbox calendar or contacts.^2^

    References

    1. General Email Settings
    2. Set up the Outlook app for iOS | Microsoft Support
    3. How do I set up an IMAP account? | Microsoft Support
    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. Jade Ng 16,535 Reputation points Microsoft External Staff Moderator
    2026-10-29T03:11:27.1833333+00:00

    Dear Sheri Vazquez,

    From your description, it appears you are adding your work email to Outlook for iPhone, and the app is asking for the IMAP and SMTP server details. The correct values depend on who hosts your mailbox, so I would like to confirm a few things:

    1. What is the domain after the "@" in your email address? Please don't share the full address.
    2. Is the mailbox hosted by Microsoft 365, or by a third-party provider?
    3. What exact error message does the app show when you try to sign in?

    In the meantime, you can try the following:

    Step 1: Check the settings on your computer

    1. Open Outlook on your computer and go to File > Account Settings > Account Settings.
    2. Select your email account and choose Change.
    3. Select More Settings > Advanced.
    4. Under Server Port Numbers, note the incoming (IMAP) and outgoing (SMTP) ports, and the encryption type for each.

    Step 2: Let the app detect your account

    1. In Outlook for iOS, go to Settings > Add Account > Add Email Account.
    2. Enter your email address and tap Continue.
    3. Sign in with your work account when you are redirected to the sign-in page. Manual IMAP settings are usually not needed for a Microsoft 365 mailbox.

    Step 3: Enter the settings manually (Microsoft 365 mailboxes only)

    • IMAP server: outlook.office365.com, port 993, SSL/TLS
    • SMTP server: smtp.office365.com, port 587, STARTTLS
    • If the app does not have a separate port field, add the port after the hostname, for example outlook.office365.com:993.

    Please note that these values apply only if your mailbox is hosted by Microsoft. If it is hosted elsewhere, your email provider, or the tech support who set up your account, will need to confirm the correct values. IMAP access may also be turned off by your organization's admin, in which case they would need to review it.

    For reference:

    Please try the steps above and let me know the result. If I have misunderstood your situation, please describe it in more detail and I'll be glad to help further.

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