SQL Server error 19723, severity 17, indicates a problem related to the database engine's inability to complete an operation due to resource constraints or other environmental issues. This type of error typically arises from topics such as memory pressure, I/O bottlenecks, improper query optimization, corruption in system metadata, insufficient permissions for certain actions performed by the user’s process or thread, or configuration mismatches.
The exact error message associated with this code can vary depending on the scenario where it occurs (e.g., while running queries involving extended features like Query Store or Availability Groups). A severity level of 17 means that SQL Server encountered a serious issue but not one so critical that the instance itself needs to shut down; instead, it's something requiring immediate administrative attention.
Error Context Investigation, start by checking further context within the SQL Server logs (i.e., `ERRORLOG`) and reviewing any accompanying messages that may provide granular details.