Thank goodness I'm dealing with a test cluster - 2014 SP2 CU 10. This is a multi-instance cluster. Two local synchronous replicas, and one remote async replica. I impulsively ran SP2 CU13 executable on the primary. The exe ran and completed. At first I thought/hoped it just ran a system validation, but i think it actually completed the update of all the instances. Some of the AGs show critical warnings and caution warnings. When i refresh the connected instance in SSMS, they still show CU 10, I don't want to restart any instances at this point. What is your guidance on next step, and how to recover if necessary. Also, should the CU13 executable have prompted me for which instance to update, or all get updated? Thanks.
Update...
The results dialogue after running the CU13 exe is as follows:
Setup administrator... Passed
Restart computer... Failed
Windows Management Instrumentation (WMI) server... Passed
Consistency validation for SQL Server registry keys... Passed
Not clustered or cluster service is up and online... Passed
Cluster group owned by local computer... Passed