Hi,

I am using AD account for email notification authentication, but the account always locked out, and the email notification will be failed, Please help check if it is a configuration issue or bug?

For outgoing mail configuration:

SMTP Host
      Protocol: SMTP
      Host Name : My exchange server 
      Port : 25
Note:  No username and password used.

For incoming mail configuration:

     Protocol : POP
     Host Name: My exchange server 
     Port: 110
     username: <user@domain>
     password: AD password

I can login the OWA mailbox by this AD account. and i am sure the password is correct.