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I just bought a new computer and can't get Outlook set up. When I open outlook, there is a pop up to add my comcast credentials (IMAP account). The server settings are correct. When I input my comcast email password, I get an error message that says "Something went wrong. Try again. You may need an app password". I called Comcast twice and they were not helpful. The person I spoke to insisted that the problem is not on their end and they don't provide app passwords. I searched the Comcast website for guidance and made sure followed the recommendations such as ensuring my Comcast email is allowing third party programs (which it is).
Looking for help on getting my email account added to Outlook.
Thanks
Using New Outlook on Windows for personal email, calendar, and contact management
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Appreciate the update and glad it seemed to fix itself. That was one of the things I saw most when I first researched this. Have a good day.
Please be sure to let us know if the answer posted above helps.
Thanks for the responses. I didn't follow the last recommendation as I was out of town. However, when I tried setting up the email account again yesterday, it went through. Didn't do anything different, so don't know why it worked this time. We can consider this case closed.
@Gary K said
add my comcast credentials (IMAP account)
FYI - The "You may need an app password" part of the error message is just generic. Outlook tags that on to any error when it fails to make a connection.
Is there any chance that your Comcast/Xfinity email account has been migrated to Yahoo?
[External Non-Microsoft Site] https://www.xfinity.com/support/articles/yahoo-email-migration-overview
If you have been migrated to Yahoo
Outlook will try to connect you to the Comcast Mail Servers because your email ends with comcast.net. You have to trick Outlook into using the Yahoo Mail Servers instead. For step-by-step instructions see this post:
New Outlook - Adding a Comcast Xfinity account that has been migrated to Yahoo See the Answer by "Hornblower409 Apr 23, 2026" in https://learn.microsoft.com/en-us/answers/questions/5868248/email-sync-error-on-new-comcast-email-account
If you have not been migrated to Yahoo
Please provide the details of the server settings you are using to add the Comcast account.
Thanks for the response. I was not aware of the migration to Yahoo, but I have not been migrated (at least I don't think so). I haven't received any communication and when I sign in to my email on Xfinity.com, I have not been asked to agree to terms set by Yahoo. My understanding is that this would happen if I was migrated. But I will contact Comcast to determine if and when I will be migrated.
These are the server settings used:
IMAP Incoming server: imap.comcast.net
Port: 993
Secure Connection Type: SSL/TLS
SMTP Outgoing Server: smtp.comcast.net
Port: 587
When I the lick troubleshooting details, the error code is "Invalid Credentials Extended Error"
There's also a Session ID with a bunch of numbers and letters and a Timestamp with 13 digits.
Thanks
Gary said
when I sign in to my email on Xfinity.com ... I have not been asked to agree to terms set by Yahoo
You have not been migrated.
the error code is "Invalid Credentials Extended Error"
New Outlook for Windows might have some bad data about your account cached and won't forget it. Let's try wiping the slate clean and start from scratch. 1 -- Nuke your New Outlook for Windows Profile.
See the answer by "Hornblower409 Dec 11, 2025" in
https://learn.microsoft.com/en-us/answers/questions/5655980/outlook-starting-error-repair-reinstall-reset-does
2 -- Try adding your account again.
You give Outlook your full comcast.net email address, it takes you to the "IMAP" setup page, you provide your normal Comcast account password. The default server settings are correct, you should not have to play with them.
Does it still break with a "Invalid Credentials Extended Error"?
Sorry to hear you're having trouble.
I'm afraid that in this particular situation you would need to continue dealing with Comcast as Microsoft would not be able to help with password issues regarding their services. I have already done a fair bit of research on your issue and the best I could find was this thread https://learn.microsoft.com/en-us/answers/questions/5693013/i-cannot-get-my-comcast-email-added-to-outlook-all with some suggestions but ultimately you would need to deal with your provider's support services for more help.