Which calendar providers does Holly support? Customer Success December 11, 2017 18:09 Updated Follow For the moment, Holly is compatible with these calendar providers: Google Outlook Acuity Hotmail drchrono Related articles Why do you need access to my calendar and contacts information? How can Holly use a specific contact information (preferences) for an office? I have 2 or more patients with the same phone I don't have an email for a patient, what can I do? Do I need to install something on my computer to use Holly? Comments 0 comments Article is closed for comments.