Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
It is most likely because MacOS no longer supports Office 2011. Also, Microsoft does not support this version as of October 10, 2017.
End of support for Office for Mac 2011
Support for Office for Mac 2011 ended on October 10, 2017. Rest assured that all your Office 2011 apps will continue to function—they won't disappear from your Mac, nor will you lose any data. But here's what the end of support means for you:
- You'll no longer receive Office for Mac 2011 software updates from Microsoft Update.
- You'll no longer receive security updates. Security updates are what help protect your Mac from harmful viruses, spyware, and other malicious software.
- You'll no longer receive phone or chat technical support.
- No further updates to support content will be provided. In fact, most online help content will be retired.