Office 365 doesn't show Endnote X8 tab

I just upgraded to MS Office 365 (with 1TB OneDrive storage) from MS Office 2016. Now, when I opened MS Word, I could not find the Endnote tab. How can I activate it? I need it badly for my publication. Any help will be appreciated. Thank you!

The steps will depend on the version of Word you installed with your Office 365 subscription. The latest version is Word 2016 for Windows and Mac. You can find the instructions to install the EndNote tools:

EndNote X8 and Word 2016 Mac :

EndNote X8 and Word 2016 Windows :

I tried installing endnote again and it worked for me both Mac and Windows.

Hope this helps!