Official Study Information from Microsoft
https://www.microsoft.com/learning/en-us/mcsa-office365-certification.aspx
Born to Learn – Microsoft Learning
https://borntolearn.mslearn.net/certification/server/f/591/t/324377
http://technet.microsoft.com/en-us/library/jj200677(v=exchg.150).aspx
http://technet.microsoft.com/en-us/library/fp161362(v=office.15).aspx
http://www.microsoftvirtualacademy.com/training-courses/office-365-deployment-for-it-pros
http://technet.microsoft.com/library/hh852466.aspx
http://technet.microsoft.com/en-us/library/jj200677(v=exchg.150).aspx
http://technet.microsoft.com/en-us/library/fp161362(v=office.15).aspx
Unofficial Study Guides
https://anderseideblog.wordpress.com/reading-lists/ms-exam-70-347-enabling-office-365-services/
Both 346 and 347
https://craigon365.wordpress.com/70-346/
https://craigon365.wordpress.com/70-347/
Even more @ https://craigon365.wordpress.com/