Configuring Federation and Public IM

For each new instance of Lync Online, federation with other organizations and with public IM providers is by default disabled for the organization. The following steps are used to enable federation and public IM:

1. Log on to the Office 365 Portal.

2. On the main page, click the Admin tab at the top, and then select Lync from the drop-down menu to open the Lync Admin Center.

3. On the left side, click Organization, and then click on the link for External communications at the top.

4. At the External communications page, under External access, use the drop-down menu to select the domain federation option that meets the organization’s policy for communication with external organizations. If the organization will manage a blacklist of SIP domains for which communication is not allowed, select the option for On except for blocked domains. If the organization will instead manage a whitelist of SIP domains for which communication is allowed, select the option for On only for allowed Domains.

5. To enable communication with public IM providers, click the check box under Public IM connectivity.

6. Depending on the domain federation mode option chosen in the previous step, the SIP domain list displayed under the Blocked or allowed domains section will be used as either a whitelist or a blacklist. To add a SIP domain to the list, click the plus symbol that appears above the list.

7. At the Add a domain box, enter the name of the domain that will be allowed or blocked in the Domain name field, and then click Add to save the setting. The domain is then listed as an allowed or blocked domain, as shown in Figure 22.6.

Figure 22.6. Federation and public IM settings in the online portal.

8. Repeat steps 6 and 7 to add any additional SIP domains that will be blocked or allowed as needed.