Microsoft Office and High Sierra
Apple have announced a major new update of Mac OS X, version 10.13 High Sierra has a number of significant changes and it is likely that applications may need to be updated. Beta test versions of the operating system have been available for a while now and the more proactive developers have already been testing their software. Unfortunately there will always be developers who seem to refuse to test their applications until the new Mac OS has been officially released.
Microsoft have already announced the results of preliminary testing of the Office suite.
Office version 15.35 and later, Word, Excel, PowerPoint, Outlook, and OneNote will install and run on 10.13, but there maybe some issues
Office 15.34 and earlier. These versions are not supported on 10.13. In some cases, you may not be able to launch the Office apps.
Office for Mac 2011. Word, Excel, PowerPoint, Outlook and Lync have not been tested on macOS 10.13 High Sierra, and no formal support for this configuration will be provided.