The version you requested (4.8.0-52.55~16.04.1) is not available, but a newer one is (4.8.0-58.63~16.04.1). We redirected you there.
This file is indexed.

/usr/share/dbus-1/services/org.freedesktop.Telepathy.MissionControl5.service is in telepathy-mission-control-5 1:5.16.3-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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[D-BUS Service]
Name=org.freedesktop.Telepathy.MissionControl5
Exec=/usr/bin/mc-wait-for-name --activate org.freedesktop.Telepathy.AccountManager org.freedesktop.Telepathy.MissionControl5