Confirm that Diagnostic logging is not enabled in the RMAD console:
If you have upgraded from version 8.5.x or earlier to 8.6 or later, confirm that the log file you are looking at is not the log for the old version. Starting with 8.6 and later, RMAD now stores the ErdAgent.log file on the DC under the RecoveryManagerAD folder. If the large log is in the QuestRecoveryManager folder and you are using RMAD 8.6 or later, the old log can be safely deleted.
If you are using version 8.5.1 or 8.5.2, please ensure you have the hotfix from the following KB article installed: