Disabling IMAP and POP in Office 365
It only takes a minute to sign up. Just migrated some accounts from an on-prem Exchange server to O Some of those accounts need IMAP access. IMAP access is turned on for those individual mailboxes in the cloud Exchange control panel, but it's not working. Pointing the client at the outlook. Username should just be the e-mail address, correct?
This would probably have worked without enabling IMAP for individual users. You can disable them for individual users. Sign up to join this community. The best answers are voted up and rise to the top. Ask Question. Asked 1 year, 8 months ago. Active 1 year, 8 months ago. Viewed 10k times. Brian Knoblauch Brian Knoblauch 2, 2 2 gold badges 28 28 silver badges 43 43 bronze badges. Do you have MFA enabled as you should? EsaJokinen Ah, good point.
I'll try turning MFA off to see if it makes a difference! Active Oldest Votes. You have multi-factor authentication MFA enabled. Esa Jokinen Esa Jokinen Thank you so much! Solves my problem perfectly. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Ben answers his first question on Stack Overflow.
Pop ". Instead of Microsoft. Imap or Microsoft. PopImap to Microsoft. Imap and Microsoft. For more information, see the following resources: Limiting access to Office services based on the location of the client Configuring client access policies Still need help?
Last Updated: Dec 30, Was this information helpful? Yes No. Tell us what we can do to improve the article Submit. Your feedback will help us improve the support experience. Australia - English. Bosna i Hercegovina - Hrvatski. Canada - English. Crna Gora - Srpski. Danmark - Dansk.
Deutschland - Deutsch. Eesti - Eesti. Hrvatska - Hrvatski. India - English. Indonesia Bahasa - Bahasa. Ireland - English. Italia - Italiano. Malaysia - English.The vulnerability in these protocols is that they do not support MFA and will allow login with only username and password even if the account has MFA enabled.
For some reason these legacy protocols are enabled by default and unless your organization has done something to mitigate this, your users may be at risk. With the increasing adoption of MFA this is a security flaw that may be easy to overlook. Hopefully Microsoft will address this, but in the meantime this is how you can disable POP and IMAP for future mailboxes being created as well as mailboxes already created in Exchange Online.
This will give you a more granular set of options, check out the post here. After making this change you can verify that this works as expected by creating a new mailbox. A user created before applying this policy will most likely have both protocols enabled. While the fix above applies to mailboxes created in the future, existing mailboxes will still be vulnerable.
To fix this you can run the script below. If you have legacy applications that communicate with Exchange Online mailboxes using POP3 or IMAP you may need to re-enable one of the protocols at least temporarythis can be done by running one of the following commands:. Thanks for pointing that out, Eric. Happy to hear it worked for you!
This was just what I needed to close a security gap. Thank you for the well written article and the commented script. Your email address will not be published. Skip to content. Output provided by the script. Aside from that, worked great. Hi Mrtin, good morning. Thank you. Leave a Reply Cancel reply Your email address will not be published.In this case the user Dave Bedrat is prompted for multi-factor authentication while accessing his Exchange Online mailbox using Outlook on the web. This prompt is caused by a conditional access rule in Azure AD that requires multi-factor authentication if the user is connecting from a non-domain computer.
However, using the Thunderbird email client to connect to the mailbox over IMAP, which uses basic authentication, is successful. Create a conditional access policy for the users and cloud apps you want to control. In the Client Apps section of the policy you can select Other clients see screenshot abovewhich includes legacy and basic authentication apps that use protocols such as POP and IMAP. Those controls all rely on modern authentication. So a practical implementation of this new capability would be to configure a separate Azure AD conditional access rule to block all legacy apps.
If necessary you can set exceptions on the users or the network locations that are still allowed to use legacy protocols. Microsoft has documented this feature here, including an FAQ. Note that it can take up to 24 hours for a new conditional access policy to begin blocking legacy clients. Within the first few hours of implementing the policy I could still connect with the Thunderbird email client. When it tried again 24 hours later, the IMAP connections were being denied.
He works as a consultant, writer, and trainer specializing in Office and Exchange Server. I have this setup and it does not work. Worked with MS tech support and still no joy in Mudville. When i configured outlook on a local network this policy is not applying. Any suggestion on this?
Enable or disable POP3, IMAP, MAPI, Outlook Web App or Exchange ActiveSync in Office 365
Practical is a leading site for Office and Exchange Server news, tips and tutorials. Read more Paul Cunningham. Comments I have this setup and it does not work.
Leave a Reply Cancel reply You have to agree to the comment policy. Find out more about advertising with us. Contact us Subscribe to our newsletter.For more information, see What are security defaults? To protect your Exchange Online tenant from brute force or password spray attacks, your organization will need to Disable Basic authentication in Exchange Online and only use Modern authentication for Outlook in Exchange Online.
The features supported by each email client programs vary. For information about features offered by specific POP3 and IMAP4 client programs, see the documentation that's included with each application. POP3 and IMAP4 provide access to the basic email features of Exchange Online and allow for offline email access, but don't offer rich email, calendaring, and contact management, or other features that are available when users connect with Outlook, Exchange ActiveSync, Outlook on the web formerly known as Outlook Web Appor Outlook Voice Access.
Each time a person accesses a POP-based or IMAP-based email program to open his or her Microsoft or Office email, that user will experience a delay of several seconds.
The delay results from using a proxy server, which introduces an additional hop for authentication.
The proxy server first looks up the assigned pod server client access server and then authenticates against that. After you enable POP3 and IMAP4 client access, you have to give users the information in the following table so that they can connect their email programs to their Exchange Online mailboxes.
By default, POP3 clients remove downloaded messages from the email server. This behavior makes it difficult to access email on multiple computers, since downloaded messages are stored on the local computer. But, you can typically configure a POP3 client to keep copies of downloaded messages on the server. POP3 client programs download messages to a single folder on the client computer typically, the Inbox.
POP3 can't synchronize multiple folders on the email server with multiple folders on the client computer. POP3 also doesn't support public folder access. By default, IMAP4 clients don't remove downloaded messages from the email server. This behavior makes it easy to access email message from multiple computers. IMAP4 clients support creating and accessing multiple email folders on the email server. For example, most IMAP4 clients can be configured to keep a copy of sent items on the server so these messages are accessible from any computer.
IMAP4 supports additional features that are supported by most IMAP4 clients for example, viewing message senders and subjects before downloading the entire message. This section discusses some of the most common connectivity options and provides some factors your users should consider when they choose connection options available in their POP3 and IMAP4 email clients. To send and receive messages every time the email application is started. When this option is used, mail is sent and received only on starting the email application.
To send and receive messages manually. When this option is used, messages are sent and received only when the user clicks a send-and-receive option in the client user interface. To send and receive messages every set number of minutes. When this option is used, the client application connects to the server every set number of minutes to send messages and download any new messages. For information about how to configure these settings for the email application that you use, see the Help documentation that's provided with the email application.
The default setting on some email programs is to not keep a copy of messages on the server after they're retrieved. If the user wants to access messages from multiple email programs or devices, they should keep a copy of messages on the server. For always-connected clients, the user might configure the email application to send and receive messages every set number of minutes. Connecting to the email server at frequent intervals lets the user keep the email application up-to-date with the most current information on the server.
However, if the client isn't always connected to the internet, the user might configure the email application to send and receive messages manually.In order to add your email account to Outlook, Outlook on the web, Outlook. Your email provider can give you these settings, but we've provided the settings for the most popular email providers below. If you're using a common email service, such as Outlook.
If you're using a regional email provider, please contact them for this information. TIP: Unsure who your email provider is?
Look at your email address. The word immediately after the symbol is usually your email provider. You can also get support from other Outlook. If you can't sign in, go to Account support. Get Started. Set up accounts. Need more help? Get support. Expand your Office skills. Was this information helpful? Yes No.
Any other feedback? The more you tell us, the more we can help. How can we improve? Send No thanks. Thank you for your feedback!The most effective final rinse is to fill a sink with warm water and soak your skin while rubbing it gently until the cleanser is gone.
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Warnings Don't pop your pimples.