Matching task Error: "Resource 'name@domain.com' does not exist or one of its queried reference-property objects are not present" (4248352)

The following are causes known to generate the error.

• The Azure AD object no longer exists in the environment
• The Azure AD object has had their license removed or is now disabled 
• A mapping file is being used and there is a typo in the column heading or the object name/id
• Possible replication delay if the UPN was changed recently 

• Verify the Azure AD objects exists and is not deleted, unlicensed, or is disabled.
• If a mapping file is being used, ensure there are no typos in the column heading of object name/id
• Wait a few hours/a day and then repeat what you had done before including removing the accounts from the project, re-discovering them, and re-mapping from File (if you are using a mapping file),

If the issue remains, open a support case and provide the following information. 

• Task Diagnostics (This article explains how to gather these)
• If a Map file is being used, attach a copy to the case
• Screenshot showing an impacted object on source and target cloud environment