535: 5.7.3 Authentication unsuccessful

Anonymous

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.

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52 answers

Anonymous

2021-02-25T00:44:56+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.

This worked for me! We have a Lexmark MFP that wouldn't scan to e-mail despite the settings being 100% correct. When I ran the "get" command it already shoed "False" but I figured I'd run it anyway and now we're scanning. I don't understand why this made the difference but I wanted to let you know!

I am keep getting this can anyone help please?

New-PSSession : [outlook.office365.com] Connecting to remote server outlook.office365.com failed with the following

error message : Access is denied. For more information, see the about_Remote_Troubleshooting Help topic.

At line:1 char:12
- $Session = New-PSSession -ConfigurationName Microsoft.Exchange -Conne ...
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  CategoryInfo : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotin
  
  gTransportException
  
  FullyQualifiedErrorId : AccessDenied,PSSessionOpenFailed
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Anonymous

2021-02-03T07:48:02+00:00

In case you have MFA enabled you have to generate an app password and try so sign in with it!
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Anonymous

2020-12-23T19:07:21+00:00

Jarrid, this worked perfect, thank you so much. GoDaddy was worthless. Do I need to set the Execution Policy back to the default? It gave me a warning when I set it to RemoteSigned.
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Anonymous

2020-12-10T22:32:56+00:00

I think it may mean that the account you've entered the credentials for doesn't have full administrator permissions to change the setting.

I encountered those PowerShell errors and you are quite correct. I realized after reading this that I'd been authenticating using the account whose properties I was checking, instead of as an Exchange administrator.
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Anonymous

2020-11-19T15:02:54+00:00

I'm not positive, but I think it may mean that the account you've entered the credentials for doesn't have full administrator permissions to change the setting. You can always authenticate as the main admin account and then change other users.
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