Add Blocked SIP Domain

Use this dialog box to block an external Session Initiation Protocol (SIP) domain.

SIP domain

The fully qualified domain name (FQDN) of the external SIP domain to be blocked from connecting to this Access Edge Server. This name should be unique and should not already exist in the Allow list for this Access Edge Server. The name cannot exceed 256 characters in length.

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Federation is a trust relationship between two or more SIP domains that permits users in separate organizations to communicate in real-time across network boundaries as federated partners. Internal users can communicate with external users of a federated partner by using instant messaging (IM) or conferencing. Users of domains that you have blocked cannot communicate with users in your organization.

For details, see the Operations section of the Office Communications Server Technical Library.

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