If you take the migration option of having the platform provision the new VNET, it will use the same subnet as the classic VNET, correct?
Also, there shouldn't be any downtime to the data plane as it is only a migration of the metadata, correct? For example, we run SharePoint, it is expected that SharePoint will stay up and available throughout the entire migration?
Also, we use a lot of PaaS that contain Web and Worker roles, since this is currently not supported, is it possible to still migrate to ARM but keep the PaaS in classic with no impact to the data plane on those as well?
LASTLY - Once a VNET in a particular subscription has been migrated to ARM, will the resources in other subscriptions that have not been migrated to ARM yet still be able to have connectivity to the VNET migrated to ARM? For example, we have VM's in other subscriptions that rely on domain controllers in other subscriptions, we want to make sure that migrating one to ARM for starters won't break anything due to loss of connectivity because ARM/Classic.
Thank you