Good evening.
I have recently completed a similar task for a large UK fashion retailer who had a similar issue after a load of windows updates messed up the dcom config, breaking several web services for there site application.
I have 14 years experience of break-fix troubleshooting. Although i am relatively new to freelancing, please rest assured that I am a professional with my freelancing work. I will not be happy until you are happy. I will need to do some due diligence to review your configuration before advising which approach is best. Its most likely that the component services will need to be reconfigured, I will need to review the event logs to see exactly what has changed. The event Id's will give me a good idea of what has happene, and then i can work out a plan to fix.
I will provide a proposal prior to any commitment from yourselves. If you need more assistance or details please contact me on chat.
As a heads up, I am on annual leave 30th,31st dec & 1st Jan.
Thanks Richard