Get connection closed by remote host after executing Connect-ExchangeOnline PoweShell

Question

Get connection closed by remote host after executing Connect-ExchangeOnline PoweShell

Pradeep Vaishya 20

Hello Team,

I've imported the Exchange Online PowerShell module to connect with the Exchange portal for performing Exchange-related activities. However, after MFA (Multi-Factor Authentication), we're encountering the attached response. Could you please assist us with this issue?

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Answer 1

Anonymous

Hi Pradeep Vaishya,

Based on the information you posted the image with, I think this is due to a network issue or a configuration issue, I suggest you follow the steps below to check the cause of the issue:

Make sure your PowerShell environment is updated to the latest version.
Ensure that you are using an Exchange Online PowerShell module that supports MFA, such as using the Connect-ExchangeOnline command.
Check your network connection to ensure that there are no firewalls or network policies blocking the connection.
Try clearing old PowerShell sessions or restarting PowerShell.
Check your authentication policy and permissions to ensure that your account is authorized to perform these actions.
If the problem persists, try connecting using the -Verbose parameter in PowerShell, which may provide additional error messages.

Pradeep Vaishya 20 Reputation points

2024-03-20T09:34:20.59+00:00

Hello Tangjie Zhang, Is there a method to obtain a list of all the URLs that Exchange Online is connecting to? My security team requires specific URLs to be opened for communication and action, rather than opening all URLs.
Pradeep Vaishya 20 Reputation points

2024-03-20T09:38:26.05+00:00

And also, after using -verbose we are getting below details related to connection.
Anonymous

2024-03-21T08:53:20.9733333+00:00

Hello Pradeep Vaishya, what are you using to connect to exchangeonline, can you send me the full script of errors?
Anonymous

2024-03-28T02:19:25.34+00:00

Any updates so far? If you have solved your problem, could you share with us? Maybe it will help more people with similar problems. Don't forget to mark it as answer, this will be easy for other community members to find the useful one.