535: 5.7.3 Authentication unsuccessful

Anonymous
2020-04-16T10:47:36+00:00

Hello,

I have an issue when using an O365 account and sending emails from an application.

The application has been suitable to use tls/starttls, port 587, ect.

When entering an email account and password, the following message occurs:

"535: 5.7.3 Authentication unsuccessful"

I would like to understand, what are the mininal features of an O365 account so that it can be used from another application.

I have performed different tests, which allow me to indicate that the account is Ok.

Thank you.

Microsoft 365 and Office | Subscription, account, billing | For home | Windows

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  1. Anonymous
    2020-07-25T08:14:27+00:00

    Took me 4 attempts with GoDaddy and only resolved because I told them what to do following reading this forum. 11 days after Brian's issue they still haven't managed to communicate the issue to their front line email \ office365 help desk.

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  2. Anonymous
    2020-08-13T23:50:01+00:00

    After going back and forth with GoDaddy I found the solution in a mix of Microsoft Articles.  Here's the easiest way to enable the accounts:

    **Open Powershell AS ADMINISTRATOR and enter the following commands:**Set-ExecutionPolicy RemoteSigned

    winrm quickconfig

    winrm get winrm/config/client/auth

    At this point you should see something that says "Basic = true"

    $UserCredential = Get-Credential

    A popup box should appear, enter an administrators username and password for Exchange (e.g. emailaddress password)

    $Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://outlook.office365.com/powershell-liveid/ -Credential $UserCredential -Authentication Basic -AllowRedirection

    Import-PSSession $Session -DisableNameChecking

    get-CASMailbox -Identity USEREMAILADDRESS | fl SmtpClientAuthenticationDisabled

    Set-CASMailbox -Identity USEREMAILADDRESS -SmtpClientAuthenticationDisabled $false

    Remove-PSSession $Session

    My original post was cut off so I re-edited.

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  4. Anonymous
    2020-08-17T20:42:58+00:00

    Hey Jarrid,

    Thank you for the insight!

    Can you please clarify this method for us dummies?

    Should I run powershell on my own PC?

    Or am I missing something?

    Godaddy support is a pain in the ***... No help at all from them.

    They are telling me that they did enable the SMTP but still I can't authenticate.

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  5. Anonymous
    2020-08-17T22:19:58+00:00

    Hi Maria,

    Yes, you can run this from your machine in an elevated PowerShell.  I don't know why this dumb wysiwyg editor keeps changing everything I put in but here's a screenshot that might help.  The fact that it's connecting to "-ConnectionUri https://outlook.office365.com/powershell-liveid/" is why it should work remotely.  Hope this makes sense.

    Since this account was already fixed it just throws errors after this point but the commands above should work.

    Here's the script in plain text:

    https://jarrids.com/docs/535GoDaddyStinks.txt

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