When you turn on the email address for federation feature, IM and Presence Service changes the JID of the local user
to the email address of the contact.

If you have an intercluster deployment, you must turn on the email address for federation on all intercluster nodes in
your deployment. You must then restart the Cisco XCP Router service after the email for federation feature is turned
on.

In an XMPP federation deployment, the email address for federation feature does not currently support temporary or
persistent chat rooms in a multicluster IM and Presence Service deployment.

In the deployment scenario where there are multiple IM and Presence Service clusters in the local domain, the local
user's actual JID may be sent to the federated user. The only impact to the chat room is that the name that displays to
the federated user is the user id of the local user, instead of the email address of the local user; all other chat room
functionality operates as normal. This only occurs in temporary or persistent chat rooms with federated users.

Email Address for Federation Considerations

When you configure IM and Presence Service to use the email address for XMPP federation,IM and Presence Service
swaps the IM address of the local user for the user's email address in all communications with a federated contact.

Before you turn on email address for interdomain federation, note the following:

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If you have not yet attempted to federate with the external domain, and you wish to turn on email for
federation, we recommend that you turn on this setting before users begin to add any federated contacts.

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If you turn on email address for federation, and a user does not have an email address configured in Active
Directory, IM and Presence Service uses the JID of the user for federation.

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A prerequisite for this feature is that the Cisco Unified Communications Manager Mail ID for each user must
match the full email address for the user. If the Mail ID field for the user is empty or does not contain a full email
address, IM and Presence Service defaults to using IM and Presence Service JID of the user for federation.

■

If you turn on email address for federation, and a federated contact uses the JID of an IM and Presence
Service user rather than using the email address, IM and Presence Service drops these requests (even if a
valid email address is configured for the user).

■

IM and Presence Service does not support email aliases for the email address for federation feature.

Cisco Unified Communications XMPP Federation Deployment Guide