But, what is the upgrade plan available.
If your company want Microsoft Access, then your company can choose Office 365 ProPlus, this packages include Self Services Business Intelligence like PowerPivot etc, Shared computer activation ( RDS ). This packages also support On premises server setup like if your company already have On-premises Exchange Server, SharePoint Server or Lync Server and if your company want to keep those server.
Rarely other open source spreadsheet have the ability of PowerPivot which can support Excel Pulgin (xll) and PowerPivot for Self Services Business Intelligence.
Alternatively, when your company want to expand your cloud operation to include Email and Calendering, Exchange Online with email like email@example.com. Your company can upgrade to Office 365 Business premium later. This packages include Online Meeting, Messenger Sharepoint Online and Yammer.
If your company upgrade to full cloud packages to include Email and Calendering. Then your expectation to your ICT Consultant change as follow :