I had success in the sample I created joining three tables from the Adventure Works DB. Employee, EmployeeAddress, and EmployeePayRate and successfully updated the data in the view.

BTW -...

While in the view designer, open the properties window and change the update specification to yes. Once you save your view, you should be able to open it and directly...

Editing data directly to the table using the SSMS has always been frowned upon from most of the DBAs I know. Being able to control the transaction commit or rollback...

In a named instance.

Leaving the TCPPort = 0 will cause it to become dynamic 

[DlgServerNetwork-0]

NetworkLibs=255

TCPPort=0

TCPPrxy=Default

NMPPipeName=\\.\pipe\MSSQL$PRD01\sql\query

Result=1