While opening reports the info log comes as "The target principal name is incorrect".
- Check that the BI Services ports are in active state
- System administration >> Setup >> Services & Application Integration Framework >> Inbound ports >> BI Services
- Open AOT >> Services >> SRSFrameworkService>>Right Click>>Add-Ins>>Register Service
- Open AOT >> Services >> SASFrameworkService>>Add-Ins>>Register Service
Thanks & Regards,