Here are instructions for how to sync multiple Office 365 Mail accounts with Dropbox for Business accounts using sync pairs like this:

Office365 Mail (bob@acme.com)/Inbox   -> Dropbox Business (box@acme.com)/Office365 Mail
Office365 Mail (alice@acme.com)/Inbox -> Dropbox Business (alice@acme.com)/Office365 Mail
...

The above will automatically convert and upload all emails matching given rules to an  Office 365 Mail folder in a user’s Dropbox for Business account.

Office 365 preparation:

• OneDrive Business accounts have to be fully provisioned. cloudHQ will not provision Office 365 OneDrive Business accounts on your behalf. This means that each of your Office 365 users needs to log in at least once to their OneDrive Business account.
• An Office 365 admin needs to be added as an admin to users’ personal websites. Instructions are here: https://support.cloudhq.net/how-to-enable-admin-access-to-all-office-365-onedrive-users.

Authorize cloudHQ to access your Office 365 domain

• Go to https://www.cloudHQ.net/services and click the “Office 365” icon:
  
• Accept Office 365 authorization:
  

Authorize cloudHQ to access your Dropbox for Business

• Go to https://www.cloudHQ.net/services and click the “Dropbox for Business” icon:
• Authorize your Dropbox for Business admin email and follow the wizard steps:Authorize your Dropbox for Business admin account: 
  

  Add Dropbox for Business accounts: 
  

  Dropbox for Business successfully authorized: 
  

Set up sync pairs from Office 365 Mail to Dropbox for Business

1. Go to https://www.cloudhq.net/multi_setup_wizard?prompt_auth=true.
   
2. Click the Office 365 icon:
   
3. Click the Office 365 Mail icon:
   
4. Select needed options and rules:
   
5. Select users:
   
6. Click the Dropbox icon:
   
7. Verify sync pairs:
   
8. Start the sync.