unable to access EXO powershell

Shahin Mortazave 486 Reputation points

Hi guy's
I am having a problem to connect to exchange online form PowerShell on a server 2012.
When try to connect get this error: Connecting to remote server outlook.office365.com failed The SSL connection cannot be established
I made sure that the TLS 1.1 and 1.2 are enabled and I can access the outlook.office365.com from IE browser but when try to access the Exchange online get this error.

Any suggestion?


Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
4,298 questions
Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
7,426 questions
{count} votes

3 answers

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  1. Vasil Michev 98,111 Reputation points MVP

    PowerShell uses .Net settings for TLS, so check for that:


    and if needed, update via:

    [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

  2. Shahin Mortazave 486 Reputation points

    @Vasil Michev , Thanks for your reply, I just check the registry HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\ and there I can see the
    TLS 1.2\Clients and a registry key DisabledByDefault withy the value of 1 I set it to 0 but still unable to connect to the exchane online.
    Do we need to add the server key and DisabledByDefault to 0? or that is noet needed?

    0 comments No comments

  3. KyleXu-MSFT 26,221 Reputation points

    @Shahin Mortazave

    Follow this article to set ExecutionPolicy as RemoteSigned, make sure basic enabled on your computer:

    Set-ExecutionPolicy RemoteSigned  
    winrm get winrm/config/client/auth  

    About managing TLS, you could follow this blog.

    You also need to make sure Exchange Online IP address could be accessed from your client.

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