For the past hour, users of Microsoft's Office 365 service are experiencing problems when they try to login to their existing subscription or activate a new one. This is a known issue by Microsoft ...

A number of Microsoft Office 365 users are reporting problems signing into and activating their Office apps.

You can fix AADSTS9002313, Invalid Request, Request is malformed or invalid activation error in Microsoft 365, by following these tips.

1] Use the correct Office 365 activation key If you are facing this problem in many instances, you might be using an illegal version of Microsoft Office or the wrong key.

A new minor update for Office 2011 for Mac adds activation support for use as part of Microsoft's newest Office 365 subscription services.

Microsoft offered a self-service model for students to get Office 365 for free, but many students hit a snag as the activation process failed.

Activating an Office 365 Home Premium or Office 365 University subscription between July 18 and September 28, 2013 will grant you a free code for 12 months of Xbox Live Gold.