To integrate sync multiple Office 365 Mail accounts with their Office 365 OneDrive Business accounts sync pairs like this:

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

The above will automatically convert and upload all emails matching given rules to folder Office365 Mail in user’s OneDrive.

Office 365 preparation:

Authorize cloudHQ to access your Office 365 domain

Set up a sync pair from Office365 Mail to Office 365 OneDrive Business