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Require Logon Using Secure Password Authentication does not work with plaintextlogin on the server side

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Hi All ;

We are in the middle of a migration Project but we stuck with this pop3 setting. Most of the mailboxes uses pop3 to connect Exchange 2010 with the setting spa + port 110 on the client side. We want to give same authentication options for the pop3 settings on 2013 side but when spa is selected the pop3 rejects the connection with the following error.

Your e-mail server rejected your login with SPA.

So both settings for pop3 protocol is same but the client cannot connect from 2013 server.

Where can i enable this feature from Exchange 2013 .


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