Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi,
Let me help you re-install the Office 365 suite.
Did you register the product using your email address during the subscription?
If yes, login to www.office.com/myaccount with the registered email address and click Install Office to re-install the Office 365 suite.
There is no additional installation count for re-installing the Office 365 suite on the same computer.
Ensure to run the fixit from the following link to completely remove all traces of Office 365 installation files before installing the Office 365 suite from your My Account page.
http://support.microsoft.com/kb/2739501
Hope the suggestions provided are helpful.
Thank you.