You can disable OAuth 2.0 authentication from the client side using the following registry key:
NOTE:
Use this option when you cannot disable the OAuth 2.0 authentication at the server side.
Location: HKEY_CURRENT_USER\Software\iManage\Work\10.0\Client\login OR HKEY_LOCAL_MACHINE\Software\iManage\Work\10.0\Client\login If the AllowOAuth2 key is specified under both HKEY_CURRENT_USER and HKEY_LOCAL_MACHINE, then settings in HKEY_CURRENT_USER are applied.