Hi hoping the community can help.
When an analyst uses the "Assign Analyst By Group" task for Incidents and switches to "Assign Group By Analyst" within the SCSM 2016 console an error message appears as soon as a letter is typed within the Analyst search box.
Please see below for the error:
Date: 13/03/2018 4:00:37 PM
Application: System Center Service Manager
Application Version: 7.5.7487.0
Severity: Error
Message: Cireson GroupAssign
System.MissingMethodException: Method not found: 'System.Collections.Generic.List`1<System.String> Cireson.AD.Functions.ADFunctions.GetUserADGroupDNs(System.String)'.
at Cireson.ServiceManager.AssignAnalystByGroup.WPF.GroupAssign.LoadTiersNew(ADUser aduser)
at Cireson.ServiceManager.AssignAnalystByGroup.WPF.GroupAssign.LoadTiers(String prefix, ADUser aduser)

Any help would be greatly received.
Thanks,
Alistair
Answers
1. Was this feature working before, but then stopped?
2. Was this a newly imported MP?
3. Did you unblock the mp before importing it into SM?
Are any of the AD Group to Support Group mappings in the Console Tier Mapping app missing?