You can any time switch to another Auto Update server as follows: 

1. Navigate to %ProgramData%\iManage\AgentServices\configs.

2. Open the update.ini file. In this file, under the [General] section, the update server location is set for the server property. For example: updates.imanage.com/Updates/Work10

3. Set the desired value to the server property.

4. Select Check for Updates in iManage Agent to pull the latest update.ini from the newly specified server path.