The Front end tools for HDB work fine when HDB was created outside of the AlwaysOn Availability Group. However after adding HDB to the AG which is also in the same group as the Main database, the HDB front end tools fail to log in with the following error:
' Cannot connect to database 'XXXXX\OneIMHistory:XXXXXX' because a system update is running.'! 2019-06-18 13:33:46 +12:00 - Error occurred in DbRequestQueue.Process (thread: Database Job Requests):  Error requesting queue '\XXXXX' for database 'XXXXXX\OneIMHistory'.  Cannot connect to database 'XXXXXX\OneIMHistory:XXXXXXX' because a system update is running. at VI.JobService.DbProvider.DbRequestQueue.Process(DbRequest request) at VI.JobService.DbProvider.DbRequestGetJobs.Process(IDbSession dbSession, RequestDispatcher dispatcher) ...........'
When attempting to login to DB Compiler HDB to compile the Database login will fail with the following errors:
' Failed to authenticate user.
 Login for user viadmin failed.
 Table AADUser not found.'
Log in user ID and password is confirmed to be correct.
In addition, Table "AADUser" will only be installed in the Main Database if the AAD module was selected during installation. This table should not be installed in the HDB.