1) Can OFFICE 365 be deployed in Windows Server R2 2012. This server is deployed to run employment related website .

2) Which can be best suitable plan for this. Either business or enterprise.

Rgds

Hello,

You can setup Office 365 Proplus on Windows 2008 R2 and newer versions,You can find more details from this link,

(https://support.office.microsoft.com/en-us/article/System-requirements-for-Office-2013-and-Office-365-ProPlus-4349bb87-531e-4ee9-8019-1d19dfab3a5a?CorrelationId=53329350-42ac-4397-a19b-eafbc70ab50f&ui=en-US&rs=en-US&ad=US)

and for plans detail, http://products.office.com/en-us/business/office-365-proplus-business-software 

Hi Balaji,

Office 365 is supported on Windows Server R2 2012. Here is the reference you'll need:

http://products.office.com/en-us/office-system-requirements

Regarding your second question, each Office 365 plan provides different Office 365 services, such as Exchange Online or SharePoint Online. So it really depends on your requirements.

For the details of each Office 365 plan, as suggested by "Ismail Kizilirmak" above, you can refer to our official site:

http://products.office.com/en-us/business/compare-more-office-365-for-business-plans

Regards,

Ethan Hua
TechNet Community Support

Installing O365 on Windows Server, will probably require the "Shared Computer Activation" feature - this feature is only available in Office365ProPlus, which comes with only two plans in my region (it may be different in your region) -

- Plan = Office365ProPlus
- Plan = Office365 Enterprise Plan E3

See the link provided by Ethan Hua for confirmation (confirm the correct region for you)

http://products.office.com/en-us/business/compare-more-office-365-for-business-plans