I get the following error log entry when I run the Archive:

Processing Mail Container: DUser01 (/o=ISTDEMO/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=DUser01)
Failed to log on to mail source: DUser01 (/o=ISTDEMO/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=DUser01)
Processing Mail Container Failed: DUser01 (/o=ISTDEMO/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=DUser01)

What configuration is incorrect?