You need to make sure that you were already using a backup solution prior to the update, preferably Apple’s Time Machine (which is included by default in OS X) or another backup programs such as Carbon Copy Cloner or SuperDuper! Here’s how to roll back an Office 2016 or Office 2011 update on Mac using Time Machine.
There’s nothing worse than updating Microsoft Office and finding that it breaks or causes Office for Mac to keep crashing but it’s actually easy to roll back an Office update on Mac.
