/etc/samba/netlogon/mozilla/profiles.ini.THUNDERBIRD is in debian-edu-config 1.818+deb8u2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | [General]
StartWithLastProfile=1
[Profile0]
Name=default
IsRelative=0
Path=H:\.mozilla-thunderbird\debian-edu-windows.default
Default=1
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