Noboddy realy remembers when their certificates expiration date are coming, so to help alittle we can create a schedule task to update your federationmetadata with Office 365.
Start a Windows PowerShell with Administrator rights and Windows Azure/Office 365 Cmdlets.
Navigate to where to saved your Automation Installation Tool and run:
You will be prompted for the federated domain, Global Administrator Credentials for Office 365 and a user with local server administrator rights.
This script will make a scheduled task that runs with these credentials once per day.