Skype for Business uses these ports and protocols:

5061 TCP (SIP) - Used for SIP/MTLS authentication of A/V users. Communications flow outbound through the internal firewall

Skype for Business is one of the primary communication channels within a corporate environment. It can impact company productivity if it’s not working properly. Skype for Business desktop clients connect to the server through many components and several configuration settings. In the Skype for Business window click on Options icon to access the menu, or click on the drop-down arrow next to it and navigate to Tools Options, then in the Skype for Business Options window navigate to General tab and under Logging in Skype for Business select Full.

443 TCP (HTTP) - Used by Skype for Business clients/Lync connecting from outside the intranet for SIP communications

Skype For Business Mac You%27re Not Configured To Connect To The Server

1024-65535 UDP/TCP - Port range used for inbound and outbound media transfer through the external firewall

Skype For Business Mac You're Not Configured To Connect To The Server Ip

Skype For Business Mac You%27re Not Configured To Connect To The Server

6891-6901 TCPPort range used by Skype for Business/Lync clients for file transfer

Make sure your firewall is not blocking these and it should work. I suspect that it is a firewall issue since it works internally on the same network.


Connection Blocking settings apply to the incoming and the outgoing connections that use a specific application, service, port, or IP address.

Configured

Skype For Business Mac You're Not Configured To Connect To The Server Login

You can use the Connection Blocking window to configure whether an application or a service that is allowed to connect to the Internet or to the local network. You can select the required network location from the Editing settings menu and configure the Connection Blocking settings.

Skype For Business Mac You're Not Configured To Connect To The Server Free

You can configure the Connection Blocking settings only if the Connection Blocking option is turned on in the Advanced window.

Skype For Business Mac You're Not Configured To Connect To The Server Pc

Skype

Skype For Business Mac You're Not Configured To Connect To The Server Windows 7

You must have a user account that has administrator privileges to perform this task.

  1. Start Norton.

    If you see the My Norton window, next to Device Security, click Open.

  2. In the Norton product main window, click Advanced or Settings.

  3. On the left pane, click Firewall.

  4. In the Connection Blocking row, click the settings icon.

  5. In the Connection Blocking window, in the Editing settings menu, select the network location for which you want to configure the connection blocking settings.

  6. Select an option in the View menu.

    The options that appear in the View menu vary depending on the network location that you select in the Editing settings menu.

    Your options are:

    Applications

    Lets you specify the Connection Blocking settings for the applications that run on your Mac.

    Services/Ports

    Lets you specify the Connection Blocking settings for the services and ports that run on your Mac.

    Zones

    Lets you specify the IP address to or from which firewall allows or blocks connections.

    All, in order of precedence

    Lets you specify the current Connection Blocking settings for the Applications, services, ports, and zones in the order of precedence.

  7. Select one of the following tabs:

    Incoming

    Lets you specify the access settings for the incoming connections that use an application or a service that runs on your Mac.

    Outgoing

    Lets you specify the access settings for the outgoing connections that use an application or a service that runs on your Mac.

    Incoming & Outgoing

    Lets you configure the access settings for connections to and from the IP addresses that you specify.

    This tab appears only when you select Zones in the View menu.

  8. Use the Action pop-up menu at the bottom of the Connection Blocking window to specify other connection blocking preferences. Your options are:

    Logging and notification settings

    Lets you specify the type of access attempts for which your Norton product must maintain records.

    You can also specify the type of access attempts about which your Norton product must notify you.

    Advanced settings

    Lets you specify the advanced firewall options.

    Reset to defaults

    Lets you reset configuration to default level.

  9. Click Done.