I'm looking into Sharepoint as a replacement for our extranet. I will be building a custom membership provider to hook into our existing membership database. However, our current setup does not require a user to have a unique email address.

I know it is fine/allowed for developing the custom implementation of MembershipProvider for a regular ASP.NTE site. Will a non-unique email be an issue for Sharepoint?


No, a unique email is not required using the SqlMembershipProvider. It uses a username to login, instead of the user's email address. There are no issues using it this way with SharePoint (and in fact that is how I have it configured in my development environment).

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