The Office 365 Updates tab can be found under University > Office 365 Updates.
The tab will only appear to companies that have an Office 365 identifier attached to them. They are automatically pulled from Office 365's update feed, so nothing needs to be done by the partner to ensure that they're up to date or accurate (that's on Microsoft's end).
Use Cases for the Office 365 Updates Tab
Rather than having to constantly provide updated training for users for a rapidly-changing platform, partners are encouraged to direct users to the Office 365 updates tab on a regular basis to stay informed on critical changes to the Office 365 platform.
Users can select specific Office categories on the right to locate updates within the past 2 years that pertain to a specific Office tool.