You may get this error while accessing your IFD deployment if you recently changed your ADFS service account password. To resolve this issue, you can follow below steps:
- Start Internet Information Services Manager and select applications pools.
- Select ADFS app service pool and click on Advanced Settings under Actions from right hand navigation.
- Click on Identity ellipse (…) under Generate Process Model Event Log Entry.
- Click on Set.. button and re-enter adfs service account credentials.
- Start ADFS app service pool.
- Also make sure to update password for ADFS windows service under Administrative Tools->Services (double click on AD FS windows service and update password under Log On tab).