Microsoft Active directory integration for oracle database user.

Hello,

Clients ask for  login database as their active directory user.

So that there will be no longer need to password policy and any other db admin operation regarding db users.

So we need to implement microsoft active directory and oracle database entegration. There is some doc. telling about needs OID (Oracle internet directory)

Is it really compulsary. Is there a way to impelement this without oid.

I could not find a how-to doc.on support about that.

A how-to doc and other advise will be appreciated.

Thanks in advance.