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https://answers.microsoft.com/en-us/mac/forum/macoffice2011-macoutlook/authentication-failed-because-outlook-doesnt/26d9c068-e1a9-4639-ab18-e01fa0a8031d
Jan 05, 2015 · Tech support scams are an industry-wide issue where scammers trick you into paying for unnecessary technical support services. ... "Authentication failed because Outlook doesn't support any of the available authentication methods."
https://www.bynarycodes.com/outlook-error-0x800ccc80-none-of-the-authentication-method-supported/
Sep 01, 2018 · Outlook 2007 and above versions support “AutoDiscovery“. This will set up your email account automatically. Enter your name, email address and password and Outlook will try to set up the profile. If it does not work, proceed with “Manually configure server settings or additional server types” and continue.
https://www.justanswer.com/mac-computers/5yfbi-authentication-failed-outlook-doesn-t-support.html
Dec 12, 2011 · "Authentication failed because outlook doesn't support any of the available authentication methods." I have various email accounts (POP3, IMAP and Exchange) and all have been working perfectly for months with Outlook 2011. I have just checked in to a hotel which uses a User ID and Login for its wireless network.5/5(9K)
https://social.technet.microsoft.com/forums/exchange/en-US/3cbca5ee-1098-4bea-afdc-d00b40510be5/none-of-the-authentication-methods-supported-by-this-client-are-supported-by-your-server
Dec 15, 2013 · None of the authentication methods supported by this client are supported by your server. Previous Versions of Exchange Exchange 2003 and Exchange 2007 - General Discussion
https://forums.cpanel.net/threads/no-support-for-any-authentication-method-message.647277/
Feb 14, 2019 · Hi, After replacing the new server, the message "There is no support for any authentication method supported by this client". Very special: The same smtp is set in win10 and can be sent successfully. Win7 returns "503 Valid RCPT command must precede DATA". Both are using outlook
https://docs.microsoft.com/en-us/outlook/troubleshoot/sign-in/kerberos-authentication-outlook-2016-for-mac
In Outlook for Mac, you do not have control over the type of authentication methods that users choose. You should ask your users to choose Kerberos authentication if your organization's Exchange server uses it and their computers are connected to the corporate network.
https://talk.plesk.com/threads/outlook-2007-authentication-issue.70571/
Feb 12, 2008 · I'm starting to get customers using Outlook 2007 and when they try to authenticate to send mail they get: "This client does not support any of the authentication methods used by this server" (or something very similar).
https://www.itpromentor.com/block-basic-auth/
Even with Modern Authentication and indeed Multi-factor Authentication enabled, you are still left open to these types of attacks. Reason being: Basic authentication is enabled by default, and Basic auth does not support MFA to begin with. And that means you can still get in with nothing more than a username and password.
https://support.his.com/supp/kb/article/280-SMTP-SSL-Authentication-issues-with-outlook-2007-(Plesk-using-IMAP)
SMTP SSL Authentication issues with outlook 2007 (Plesk, using IMAP) Some Outlook 2007 IMAP users have reported issues authenticating to our Plesk mail servers to send mail. with an error: "This client does not support any of the authentication methods used by this server" Here is a fix around this issue:
https://social.technet.microsoft.com/Forums/exchange/en-US/75f8d6c4-70f4-49e5-ac32-a49dd91b5520/outlook-anywhere-ntlm-for-internal-users-and-basic-for-external-users
Nov 26, 2012 · You may need to choose Basic Authentication if the connecting computers are not members of the domain, if the ISA Server publishing rule and listener are shared with other Exchange services that require Basic Authentication, or if the firewall being used does not support NTLM authentication.
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