There are plenty of organizations are offering such kind of services. Normally MS Dynamics is compatible with Azure as it is a Microsoft cloud product. But where as coming to third party one like box and dropbox, we need other plugin support. You need to write your own code if you are a developer. I am pretty sure you are not belongs to that category. Its better to get in touch with any developer to get custom plugin or you can approach any organization which provides Microsoft Dynamics 365 (CRM) Development and Microsoft Dynamics NAV Development solutions with affordable price. Take a look of those things. I thinks this info will resolve your problem.
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