Did you know Marketo syncs your entire database with Dynamics? It syncs, then waits 5 minutes and then syncs again, all day, every day. Here are some details about how Marketo treats Dynamics Accounts specifically.
You will need a dedicated Microsoft Dynamics CRM user for the purpose of the integration. We call this user the Sync User.
The user sync is one way - Dynamics to Marketo. If you make changes to a user in Dynamics the changes will be reflected in Marketo.
No. Marketo cannot create users in Dynamics.
You can select fields to sync during setup. But Marketo will only sync the fields that your Dynamics sync user has access to.