Looks like the latest version of Mac Mail on Sierra doesn't work with Exchange 2016. It works fine with our Exchange 2013 server. I am getting Unable to Verify account name or password. Outlook 2016 for Mac works fine and all windows clients are working fine so it seems to be a Mac Mail issue. Hi You may follow this below article for a work around to. We are using exchange 2016. Mac users keeps on disconnecting on exchange using mac mail. The issue is reported to Microsoft. Below is a summary of the case. Symptom: MacBook apple mail always disconnect on exchange server. Cause: Autodiscover process not correctly handle by MacBook. Resolution: - Checked that all server components and services. Unable to setup Exchange Server in Apple Mail with macOS Catalina I recently upgraded to macOS catalina and was experiencing a few minor issues. I decided to remove my principal mail account and re-add to try to troubleshoot the issue.
Do you need these mail server settings?
You can use the mail server settings in this article to manually set up your email app to send and receive email with an iCloud email account. However, you shouldn't need to do that if you meet iCloud system requirements and can use any of these setup methods:
Use iCloud Preferences on your Mac in OS X Lion 10.7.4 or later.
Use iCloud for Windows on your PC in Microsoft Windows with Outlook 2010 through Outlook 2016. Set up two-factor authentication and, if needed, generate an app-specific password* to use for iCloud Mail.
Use iCloud settings on your iPhone, iPad, or iPod touch with iOS 7 or later.
Mail server settings
Refer to your email app's documentation for information about how to use these settings. iCloud Mail uses the IMAP and SMTP standards supported by most modern email apps. iCloud does not support POP. If you set up an account using iCloud System Preferences or macOS Mail in 10.7.4 or later, you won't see these settings because they're automatically configured.
Mac Email Server
IMAP information for the incoming mail server
Server name: imap.mail.me.com
SSL Required: Yes If you see an error message when using SSL, try using TLS instead.
Port: 993
Username: This is usually the name part of your iCloud email address (for example, emilyparker, not [email protected]). If your email client can't connect to iCloud using just the name part of your iCloud email address, try using the full address.
Password: Generate an app-specific password.
Exchange Server Mail Mac
SMTP information for the outgoing mail server
Server name: smtp.mail.me.com
SSL Required: Yes If you see an error message when using SSL, try using TLS or STARTTLS instead.
Port: 587
SMTP Authentication Required: Yes
Username: Your full iCloud email address (for example, [email protected], not emilyparker)
Password: Use the app-specific password that you generated when you set up the incoming mail server.
Exchange Server For Email Account
* You only need to use an app-specific password if you’re manually setting up mail with your iCloud account in Windows, if you use Mac OS X Mail (10.7.4 and earlier), or if you use any other third-party mail client.Microsoft remote desktop connection client for mac 2.1.2 download.