Kunal,
I assume you mean disabling this when it connects to the Agentry server. Agentry requires you to have at least one backend configured to authenticate the user. That being said you can setup the authenticate to accept any user / pwd combination. This is how the MOB300 class works. They are using a SQL backend to validate the user/pwd combination and it replies that all user / pwd combinations are valid.
Since you are using Work Manager this is probably not a good idea since you will need to authenticate in order to connect to SAP. This will require a valid SAP user/pwd so if Agentry accepts any combination you will have a problem trying to connect to SAP.
--Bill