Welcome to Justanswer.com,my name is ***** ***** I will do my best to assist you.
Office 2011 and 2016 isnt fully compatible with El capitan. It can be made to work, but it sometimes can be quite the process.
For that reason, I am sending you and offer for remote support where I can connect to your mac from here and work on resolving the issue in person. This is optional.
If you would prefer to work through this by written support only, let me know~
Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.