AADSync and Disabled Users

Hello,

I have set up the AADSync and it is working successfully.  The only problem I see is I get Directory Sync Error Report with a list of users that are disabled in the local directory.  I get the following error:Unable to update this
object because the following attributes associated with this object have values
that may already be associated with another object in your local directory
services

How do I deal with these as I just can't delete the disabled users?

Thanks!

Shawn