Hi Rajeshkumar,
Before addressing your query, can you explain what kind of update you referred to when saying “rollup”?
If you refer to “the service upgrade from Office 365 pre-upgrade to after-upgrade”, our service upgrade center provides much information for your reference: http://community.office365.com/en-us/wikis/upgrade/guide-to-the-office-365-service-upgrade-for-2013.aspx
If you refer to a planned maintenance that we are performing on SharePoint service in June and July 2013, you may experience the unexpected issue temporarily during the maintenance period, The planned maintenance will be noted in the Service Health Dashboard in the Microsoft Office 365 portal. For additional information related, see: http://support.microsoft.com/kb/2863202
If you refer to anything else or there is anything needing t clarify further, I’ll appreciate it if you can provide more details, such as the email notifications you received, an example about the issue you encountered for further research.
Thanks,
Maggie Li