Hi Janakiram,

It will be helpful if you could share more details.

Are you trying to Create a login account to Contact in Commerce manager ? is CMS user acocunt created separately ? 

//M

Thanks for the replay.

I am using  'Create a contact with account' feature in commerce to add new useraccount, it is allowing multiple user creation with same email.

Unfortunately, I can't add hyperlinks or images to explain more in detail.

It would help the question is more clear, but I guess the problem you have is that Commerce Manager allows creating contact even there was an existing contact with same email address associated? 

Yes Quan.

@Janakiram, please check if there is an user-account with same email before adding another and just add Contact entry in Commerce Manager with same email id. Check if that works fine.

Hi  Quan & Mouneswar,

We dont want to create a new user with the email that already has an account in the commerece. Can we achieve that?

Commerce Manager does allow to create Contacts with duplicate email ids, internally it maintains ContactId and UserId which are unique.

You can achieve this programmatically either while creating the account or on first login, however it depends on how the user management is implemented in your solution.

@Janakiram

Are you using membership or custom implementation? i.e. owin?

If its membership then you add

requiresUniqueEmail="true"

to your web.configs otherwise you can do as Mouneshwar suggested and code it in your custom implementation