A sign-in message was received that contains incorrectly formatted data. Format error: %1 This situation can be due to rogue ...

A sign-in message was received that contains incorrectly formatted data. 
Format error: %1 

This situation can be due to rogue clients; interoperability failure with non-Microsoft, single-sign-on software; or message tampering. 

User Action 
If you are using non-Microsoft federation software in your environment, verify that the federation software is compatible with AD FS.