The remote server did not satisfy the mutual authentication requirement.

By | Jul 30, 2015


  • Check the SPNs of the client end point inside the wcf configuration file. Make sure that the destination endpoint is defined correctly.
  • This can be caused by requiring kerberos authentication where is it not possible. In this case make sure that allowntlm is enabled for the particular service.
  • Keep in mind that Kerberos caches the SPN tickets. Purge them on all machines when making a change to them.
  • Restart the app pools in IIS and restart the services after doing klist purge.
  • Sometimes a IISReset is also required.
0 0 vote
Article Rating
Notify of

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Inline Feedbacks
View all comments