Using Salesforce with Office 365
Currently, the Salesforce plugin for Outlook does not support the industry standard of software installation called click-to-run. Consequently, customers downloading and installing Office 2010 or Office 2013 from the Office 365 Portal are unable to install the Salesforce plugin.
Fortunately, there is a straightforward workaround:
1) If you’ve already installed Office, then uninstall.
2) Download and install the free evaluation copy of Microsoft Office from the link below:
3) When prompted to activate on first run, select Organizational Account instead of Product Key and enter your Office 365 e-mail address and password.
Because the evaluation download does not use click-to-run, you can now use your licensed copy of Office as part of Office 365 and install the Salesforce plugin.