title: External login options for Sharepoint?
body: <p>We have a Sharepoint Project Management site up and is active amongst our clients. The site url looks like this:</p>
  
  <p>https://projects.acme.com/clients/[client_name]</p>
  
  <p>Each of our clients has to remember (or bookmark) this long url; the users of this site are not very savvy. They fumble with it all the time. We also do not want clients to know who each other are; so client 1 shouldn't know that client 2 is a client.</p>
  
  <p>We would like to put a login form on our website, prompting for user id and password. Then we would like to be able to route the user based on a successful authentication, to the specific web that is theirs. </p>
  
  <p>Is there a good clean way to make this happen? Is forms authentication the way to go? Are there drawbacks to using forms authentication?</p>
  
  <p>Given my url structure, would this approach work?
  <a href="http://msdn.microsoft.com/en-us/library/bb975136(v=office.12).aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/bb975136(v=office.12).aspx</a></p>
  
  <p>Update: I'm not particularly interested in a solution that requires two weeks of effort on the part of a programmer/admin to setup, nor am I particularly interested in one of the commercial solutions that are $4k-8k. I was hoping to discover a pretty straightforward way to get this done in under a day of effort.</p>