Problem continues. Here is a console log before I rebooted, showing that the printer can't connect to Yosemite, followed by a reboot and the log where it did connect. Does this give anyone anything to help troubleshoot it?
9/18/15 11:07:20.520 AM digest-service[28883]: digest-request: uid=0
9/18/15 11:07:20.540 AM digest-service[28883]: digest-request: netr probe 0
9/18/15 11:07:20.540 AM digest-service[28883]: digest-request: init request
9/18/15 11:07:20.542 AM digest-service[28883]: digest-request: init return domain: DHKSMAC server: DHKSMAC indomain was: <NULL>
9/18/15 11:07:20.844 AM digest-service[28883]: digest-request: uid=0
9/18/15 11:07:20.845 AM digest-service[28883]: digest-request: init request
9/18/15 11:07:20.847 AM digest-service[28883]: digest-request: init return domain: DHKSMAC server: DHKSMAC indomain was: <NULL>
9/18/15 11:07:20.856 AM digest-service[28883]: digest-request: uid=0
9/18/15 11:07:20.856 AM digest-service[28883]: digest-request: init request
9/18/15 11:07:20.859 AM digest-service[28883]: digest-request: init return domain: DHKSMAC server: DHKSMAC indomain was: <NULL>
9/18/15 11:07:21.778 AM digest-service[28883]: digest-request: uid=0
9/18/15 11:07:21.780 AM digest-service[28883]: digest-request: od failed with 2 proto=ntlmv2
9/18/15 11:07:21.780 AM digest-service[28883]: digest-request: user=DHKSMAC\David Kaplan
9/18/15 11:07:21.793 AM digest-service[28883]: digest-request: kdc failed with -1561745592 proto=ntlmv2
9/18/15 11:07:21.793 AM digest-service[28883]: digest-request: guest failed with -1561745590 proto=ntlmv2
After Reboot:
9/18/15 11:14:16.963 AM digest-service[779]: digest-request: uid=0
9/18/15 11:14:16.972 AM digest-service[779]: digest-request: netr probe 0
9/18/15 11:14:16.973 AM digest-service[779]: digest-request: init request
9/18/15 11:14:16.976 AM digest-service[779]: digest-request: init return domain: DHKSMAC server: DHKSMAC indomain was: <NULL>
9/18/15 11:14:17.295 AM digest-service[779]: digest-request: uid=0
9/18/15 11:14:17.295 AM digest-service[779]: digest-request: init request
9/18/15 11:14:17.298 AM digest-service[779]: digest-request: init return domain: DHKSMAC server: DHKSMAC indomain was: <NULL>
9/18/15 11:14:17.310 AM digest-service[779]: digest-request: uid=0
9/18/15 11:14:17.311 AM digest-service[779]: digest-request: init request
9/18/15 11:14:17.314 AM digest-service[779]: digest-request: init return domain: DHKSMAC server: DHKSMAC indomain was: <NULL>
9/18/15 11:14:18.244 AM digest-service[779]: digest-request: uid=0
9/18/15 11:14:18.247 AM digest-service[779]: digest-request: od failed with 2 proto=ntlmv2
9/18/15 11:14:18.247 AM digest-service[779]: digest-request: user=DHKSMAC\David Kaplan
9/18/15 11:14:18.263 AM digest-service[779]: digest-request kdc: ok user=DHKSMAC\David Kaplan proto=ntlmv2 flags: ENC_128, NEG_NTLM2, NEG_NTLM, NEG_TARGET, NEG_UNICODE