There are three basic setups for Office 365 accounts:

 

Web-based Office 365

This article will not apply to you. Consider setup for using Retriever Cloud for Office 365.
Related Article: Retriever Cloud for Office 365

 

 

 

On-premise Microsoft Exchange

Retriever Cloud will not sync in those situations. Easily sign up for a free outlook.com or hotmail.com account at office.com that will sync with Retriever Cloud. This account only needs to be used for the Contact/Calendar sync and the email functionality may be completely disregarded.

 

 

 

Hosted Microsoft Exchange (Exchange Online or a Hybrid Deployment)

Retriever Cloud can be used to sync in this situation. If you have a hybrid deployment there are settings that your IT person will need to make sure are in place for this to work for your office.
 

• Mailbox requirements
  -- All on-premises mailboxes that will use the REST APIs must be located on databases located on Exchange 2016 CU3 servers.
  
  
• Infrastructure requirements 
  -- All Exchange 2016 servers must be upgraded to CU3 or later.
  -- On-premises Active Directory must synchronize with Azure Active Directory.
  -- Any Exchange 2013 servers co-existing in the same load-balanced array with Exchange 2016 servers must be removed from the array.
  
  
• Networking requirements
  -- From a DNS perspective, the Autodiscover namespace and on-premises client namespace must have Internet DNS records.
  -- If you have a firewall or application gateway that inspects and restricts access, update the appropriate settings to allow discovery and access.