There is a logon script that runs the following (Replace the server with whatever your imanage server is)

“C:\Program Files (x86)\Interwoven\WorkSite\addiman.exe” %IMANAGESERVER%

The details can also be added via Registry in the Group Policy : 

Key : HKCU\Software\Interwoven\WorkSite\8.0\Common\Login\RegisteredServers\%IMANAGESERVER%\

Value : Autologin
Type : REG_SZ
Value Data : Y

Value : DATABASES
Type : REG_MULTI_SZ
Value Data : %DATABASE%

Value : Local
Type : REG_SZ
Value Data : N

Value : Password
Type : REG_SZ
Value Data : 

Value : ServerName
Type : REG_SZ
Value Data : %SERVERNAME%

Value : TrustedLogin
Type : REG_SZ
Value Data : Y

Value : UserID
Type : REG_SZ
Value Data :