Watch our video tutorial: System settings.

You can make all general XPhone Connect Server settings here.

Domain (namespace)

The domain is used for forming user identities and login names in accordance with the <Name>@<Domain> diagram. Example:

The XPhone Connect Server domain is also the basis for the FQDN configured under Federation. The FQDN can be the server domain or a direct sub-domain.

Changing the domain

An administrator can change the XPhone Connect Server domain. This requires deactivating Federation globally beforehand.


  • By changing the domain, the login names and IM addresses (federation) of all users change from <name>@<old_domain> to <name>@<new_domain>. The Windows logon of the XPhone Connect Clients will continue to work, but the user will have to set up the logon data for the Mobile Client again!

  • Presence queries by Federation contacts previously responded to (e.g. from MS Teams) are created again for the updated IM address and the external contacts may also receive new queries in their respective client.

Login & publishing

Activate the check box Allow automatic login if XPhone Connect Clients are allowed to automatically log into the XPhone Connect Server. User interaction is not necessary here, if an integrated Windows login is active for the respective user.

Activate the check box Publish address of the XPhone Connect Server, if the address of the XPhone Connect Server should be published in the internal network as well as in the Active Directory via UDP so that the XPhone Connect Clients find this server automatically.

Mobile App

Two URLs are entered here, which must also be accessible from the Internet:

  • URL for access by XPhone Mobile App

    This URL is for all XPhone Connect Mobile functions except telephony.

  • URL for access to XPhone web API for telephony in the mobile app

    This URL is required for using telephony in the mobile app such as device selection and Softphone Mobile.


If ports other than 443 are to be used for https-encrypted connections, the desired port (here:7443) must be written after the FQDN. e.g.


If you want to make IIS available via a reverse proxy, please add the following URLs to your reverse proxy:

  • https//

  • https//

If needed, check the Enable push notifications checkbox. If the Push notifications are enabled, you can send them via a Proxy server, for this check the Use proxy settings for sending push notifications checkbox.


UM Settings

Enter the URL that is accessible for UM Settings. If the default URL is to be used, leave this field blank.

UM Settings allows access to user settings for voicemail, fax and SMS via a web interface.

The other settings for external accessibility of this function can be found in the web.config file.


For web meetings with external participants, activate the Web meeting option here and enter the externally accessible URL. If the default URL is to be used, leave this field blank.

The other settings of this function can be found in the configuration of the site or configuration group under Collaboration.

The settings for external accessibility of this function can be found in the web.config file.

If participants in the web meeting report different quality in the display of the screen sharing, this is due to the individual bandwidth optimization during the transmission of the images. Depending on the determined bandwidth to the receiver, the calculation of the images for transmission is dynamically adjusted.


  • Web-Meeting does not support operation on web server farms, only a single server may be used for this purpose.

  • For allocating or limiting bandwidth quotas of screen sharing in web meetings, please refer to the recommended QoS configuration.

  • If the Participate profile pictures of XPhone Connect users are to be visible for web meeting participants in the meeting, the entry Authenticated must be added in the XPhone Connect Directory configuration in the permissions of the XPhone Users data source.


  • The connection to web meeting should always be encrypted, unencrypted configuration should be enabled only for temporary testing.

  • Please refer to the following chapter: HTTPS configuration on the IIS.


If you want to make IIS available via a reverse proxy, please add the following URLs to your reverse proxy:

  • https//

Privacy policy for web meeting


The privacy policy on the registration page for web meetings represents a template that must be checked and, if necessary, adapted by the operator of the XPhone Connect Server (provider of the web meeting) before productive use! The HTML files in German and English are located on the XPhone Connect Server in the directory:

  • C:\Program Files\C4B\XPhone Connect Server\WebMeeting.Api\DataPrivacy\Install

This contains the {RetentionTime} parameter, which is replaced at execution time by the storage duration of the journal or chat data. This value is dynamically set by the server and gets the larger value of the IMDeleteAfterDays and JournalDeleteAfterDays settings from the atlas.xml file. To customize the privacy statement, copy the templates (DataPrivacyStatement_DE.html or DataPrivacyStatement_EN.html) to the directory above:

  • C:\Program Files\C4B\XPhone Connect Server\WebMeeting.Api\DataPrivacy

and then process those copies according to your privacy policy.

QoS for Web-Meetings

When the Web Meeting feature is installed on the IIS web application host, two new QoS policies are created. These assign prioritization using DSCP and limit the bandwidth of the feature to 50 Mbps.

Using the QoS Policy for Web Meeting

  1. On the computer, enter the command gpedit.msc via Start > Run.

  2. Edit a QoS policy under Computer Configuration > Windows Settings > Policy-based QoS.

    • XPhone Connect Web Meeting (for HTTP)

    • XPhone Connect Web Meeting SSL (for HTTPS)

  3. In the Policy Profile tab, check the default settings:

    The recommended DSCP value for video is 34 (equivalent to AF41 - Assured Forwarding).

    The default for the max. outgoing data rate is 50 MBit/s, adjust if necessary.

  4. In the Application name or URL tab, enable the Only HTTP server applications respond for the URL option.

    Enter the URL of your server application and enable the Include subdirectories option:

    http://<hostname>/XPhoneConnect/WebMeeting.Api or: https://<hostname>/XPhoneConnect/WebMeeting.Api

    The URL may contain ‘*’ as a wildcard, but must conform to RFC 1738, see also

  5. In the IP Addresses tab, enable the QoS policy is applied to any destination IP address option.

  6. Save the settings with OK.


If the default URL for Web-Meeting has been changed, the QoS rules must also be adapted to it. You can use a network connection analysis program, such as Wireshark, to check your set settings.

The web meeting packets sent by the XPhone Connect web server are now provided with a DSCP tag, which can be evaluated and prioritized at the router or in the firewall for outgoing network traffic. For example, this can be used to set up bandwidth quotas or restrictions for web meeting.

Online dokumentation

Enter the URL for access to the online documentation here. If you want to use the default URL, leave this field blank.

Proxy settings

These proxy settings are used by XPhone Connect Server to access the Internet, e.g. to retrieve license information, communicate with the Graph-API, STUN server and TURN server-servers.

If the Proxy settings for sending push notifications option is enabled in the Mobile App section above, these settings also apply to sending push notifications to the mobile app.

If a proxy server is to be used, select the Use proxy server checkbox and specify host name or IP address and port.

If the proxy server requires authentication, activate the check box The proxy server requires authentication and select the authentication method.

The proxy settings to be configured here are used be the XPhone Connect Server to access the internet. You can obtain all data required for this from your IT system administrator.

After you have saved your entries for the proxy settings, you can use the Test connection button to perform a connection test with the currently entered proxy settings. If the test is successful, a message The C4B license server could be contacted successfully appears.


Ensure a functional DNS server when entering a host name.

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