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Outlook uses IMAP to connect to a Microsoft 365 account and reports a mistake
The connection configuration is as follows The error message is as follows The connection test failed Test details Collapse all Testing IMAP for a u...
Ran into this issue while setting up IMAP on Exchange 2019.
Need to configure is the LoginType. This can be achieved by running a command in the Exchange Management Shell (elevated). Default is set to SecureLogin.
Сommand:
Set-IMAPSettings -Server <SERVER> -LoginType PlainTextLogin
The LoginType parameter specifies the authentication method for IMAP4 connections. Valid values are:
1 or PlainTextLogin.
2 or PlainTextAuthentication.
3 or SecureLogin. This is the default value.
Need to configure is the LoginType. This can be achieved by running a command in the Exchange Management Shell (elevated). Default is set to SecureLogin.
Сommand:
Set-IMAPSettings -Server <SERVER> -LoginType PlainTextLogin
The LoginType parameter specifies the authentication method for IMAP4 connections. Valid values are:
1 or PlainTextLogin.
2 or PlainTextAuthentication.
3 or SecureLogin. This is the default value.