Reduced functionality using forms authentication (FBA) in SharePoint

Answer 1

This functionality is by design. As per Microsoft:

When you configure a zone to use forms authentication, the Enable Client Integration box is cleared by default. If a zone is configured in this way, the following changes occur in functionality:

• Support for remote interfaces is turned off. That includes WebDAV, SOAP, and Microsoft Office FrontPage remote procedure calls (RPC). Some functionality is not available, such as Web folders or the Web services for accessing content in that site.
• Some toolbar items no longer appear:
  • New Document
  • Open in Outlook
  • Open In Windows Explorer
  • Export to Spreadsheet
  • Open with Database Program
  • Explorer View option is hidden.
  • Create an Access View option is hidden.
• In picture libraries, the following functionality is removed:
  • Upload Multiple
  • Edit Picture
  • Download
  • Send To
• On the Edit Control Block (ECB) menu, the drop-down menu that appears when you click - items in document libraries, the following items are removed:
  • Edit in Word
  • Edit in Excel
  • Edit in PowerPoint
  • Discuss
  • Connect To Outlook
• In slide libraries the following functionality is removed:
  • Publish Slide
  • Send to PowerPoint
• Also, syncing SharePoint data with Microsoft Office Outlook no longer works.

Answer 2

Form Authentication will reduce some functionality such as in document llibrary we wont see new document, edit in spread sheet,open with windows explorer etc.

For that we need to enable the feature called Client Integration in Authentication

Provider.After enabling that we ll get all menu items.