Standard Access from one adwords a/c to another

I have 2 google adwords accounts. Both are under a same MCC account.
Now, I need to give one adwords a/c access to the other adwords a/c.
This invite user doesnt really help - it actually sends an invite to sign up for a new adwords a/c. And doesnt seem to accept an existing adwords a/c.

Has anyone tried this before ?

 

You can't have one email linked to two adwords accounts. What is a/c?

 

Google account.
I thought it was like google analytics where another google a/c can access another google analytics separately.

Its there in adwords as MCC but I was wanting to share one adwords a/c with another adwords a/c.

 

I think you can do that from inside that account itself, not from MCC.

 

Tried - only email ids that are not yet associated with a google a/c can have access. For existing adwords users, it shows this user is already an adwords user.

 

Oh, I understand now. Yes, once an email is associated with one adwords account, there's no way to disassociate it. You must invite another email address. You can get a free temporary one with gmail and simply forward it to your regular email.

 

There should be a way to associate an adwords a/c to more than 1 MCC.

 

Yes, you can put one MCC under another MCC, but I don't think this is what he was asking.