Saper_ek (Saper_ek) June 6, 2024, 6:58am 1 End of last year I did exchange 2016 to 2019. Everything was working after that. Begginning of this year, Exchange stopped indexing new content. By every standard, piece of information, or script I can find, everything is working just fine. But search is not returning new messages. Like if the time stopped on january. The only errors I get, is that the Microsoft Exchange Search Host Controller service cannot start. So naturally this is my first suspect.