A comprehensive suite of productivity tools and cloud services that enhance collaboration, communication, and efficiency. Combining classic Office apps with advanced Microsoft 365 features, it supports both personal and business needs
Office365 should be properly configured, - go to https://portal.office.com/admin/default.aspx#DomainManagerPageLayout - select the domain then click the Find and Fix issues link to the right of the domain name. Does it report any errors?
I don't know if this applies anyone here - https://support.microsoft.com/en-us/kb/2404385