Via http://trials.dynamics.com there are trials for the following Dynamics 365 Apps:
- Sales Enterprise
- Sales Professional
- Customer Service
- Field Service
- Project Services Automation
- Marketing
- Finance & Operations
- Retail
- Talent
- Business Central
There is no self-service trial for Marketing, only a concierge trial where you have to contact Microsoft first.
The Sales Professional trial is at the time of writing missing but you can add a trial of Sales Professional from within your Office 365 tenant.
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