how to connect outlook 2016 to comcast mapi

If you use MAPI over HTTP and the Authentication with Exchange Server Group Policy setting for Outlook, you must update the setting to use the Kerberos/NTLM Password Authentication that MAPI over HTTP uses as the authentication method. Enter the user credential in the format of domain/user.Remove all credentials that start with MicrosoftOffice15_Data:SSPI or MicrosoftOffice16_Data:SSPI.In Control Panel, click User Accounts > Credential Manager > Windows Credentials.To work around this issue, remove the cached credentials from Credential Manager on the users' computers.

(Office 365 may be selected by default - BE SURE to change that select to Exchange to set up a MAPI connection to SmarterMail. You may be presented with an Advanced Setup modal - select Exchange from the list of options if you are. This issue occurs because Outlook 2016 or 2010 keeps trying to use the credentials that were cached for the old RPC over HTTP protocol. Enter the full email address you want to set up. After the change, Outlook 2016 or Outlook 2010 users are repeatedly prompted for credentials to connect to Exchange Server. To resolve this, remove the connected IMAP account in and reconfigure it as a POP connection. You change the protocol that your Outlook clients use to access Microsoft Exchange Server from RPC over HTTP to MAPI over HTTP. If you use to access an account that uses a domain other than, , or, you might not be able to sync your accounts using IMAP.

How to connect outlook 2016 to comcast mapi