Event ID 56 and 50 from TermDD: a certificate or security-layer fault is dropping RDP sessions
Microsoft attributes TermDD Event 50 to a corrupted server certificate and Event 56 to a security-layer mismatch. Fix those before MTU or NIC offload.
Event ID 226 and Event ID 9519: an Exchange database will not start
Event ID 226 with Event ID 9519 means the store could not start a database. The hexadecimal code inside the event is the diagnosis, not the event number.