A note on using a site with Forms based Authentication and SharePoint Designer. SharePoint Designer doesn't allow to authenticate forms based users.
There are three ways you can use this with Forms based auth.
- The first is to sign into the site first and select the 'Sign me in automatically' checkbox.
- Alternatively, you can have the same SharePoint site accessible using different authentication schemes by 'extending' a site. (Central Administration -> Application Management -> Create or Extend Web Application.) When you extend an existing site, you create a new Zone, and each zone can use a different authentication mechanism and membership provider.
- Or, add windows domain users in SharePoint and use those credentials to login in SharePoint Designer :)=
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