Contact Problems

Fix Outlook on the Web From Button Not Showing All Email Addresses

Partner Editor Oct 12, 2026 868 views

Question details

The user cannot see all available email addresses in the 'From' dropdown menu when composing an email in Outlook on the web.

How to Fix Outlook on the Web From Button Not Showing All Email Addresses

Product: Outlook on the web
Device & OS: not provided
Scenario: Composing a new message or replying to an email and attempting to select an alternate sending address.
Observed behavior: The 'From' button dropdown menu is missing expected email aliases or delegated addresses.

Before you start

Verify that your internet connection is stable and confirm you have 'Send As' or 'Send on Behalf' permissions for the email addresses you are trying to use.

Solution 1Recommended

Clear Browser Cache and Disable Extensions

Use this solution to eliminate display issues caused by corrupted browser data or interfering extensions.

Outdated cache files, tracking cookies, or third-party browser extensions (like ad blockers) can interfere with how Outlook on the web loads interface elements, including the 'From' menu.

Clear browsing data

Open your browser's settings, navigate to the Privacy or History section, and clear your cache and cookies for all time.

Disable extensions

Go to your browser's extension manager and temporarily toggle off all active extensions.

Test in a Private window

Open an Incognito or Private browsing window, log into Outlook on the web, and click the 'From' button in a new email to check if the addresses appear.

Clear Browser Cache and Disable Extensions

Tip: If the addresses appear in a private window, a disabled extension was likely causing the conflict. Turn them back on one by one to identify the culprit.

Solution 2

Verify Account Allowances and Exchange Settings

Use this if browser troubleshooting fails, as the issue may stem from account configurations or server-side permissions.

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Frequently Asked Questions

Can I manually add a missing address to the From button in Outlook on the web?

Yes. When composing an email, click the 'From' button, select 'Other email address...', and manually type the address. Outlook will attempt to send from it, provided you have the required permissions.

Why did my email alias suddenly disappear from the dropdown list?

This often occurs after a major browser update, an accumulation of corrupt cache data, or if an administrator recently modified your Exchange server mailbox permissions.

How long does it take for new 'Send As' permissions to appear in Outlook on the web?

If an administrator recently granted you permission to send from another address, it can take up to 24 hours for the Exchange server to sync those changes to your Outlook on the web interface.

Outlook & Email Problems