By default, the Active Administrator Console enumerates the number of users, which can take longer than normal in certain environments; and/or the Active Administrator Server Management attempts to contact the status of each Domain Controller when opening.
When opening the Active Administrator Console, by default, the option “Display Charts” is checked:
Un-check this option to open the console faster:
Within the Active Administrator Server Management console, go to Tools > Settings > Collection Agents tab. Uncheck the option “Acquire Domain Controller status on start-up”, as shown below:
This console should reopen faster now.
NOTE: With this option unchecked, the Domain Controllers listed on the Active Administrator Server Management console > Collection Agents tab will not have the current status, and will need to be refreshed manually to obtain the current status.