Hello.
I have weird problem. Content index on mail dbs don't go over crawling and healthy.
I have 2 exchange 2013 CU 12 servers, no DAG.
After restart this servers, on both servers Content index state become Failed.
After searching on Internet I find solution:
Stop the Microsoft Exchange Search and Microsoft Exchange Search Host Controller service.
Browse to where the database files are located on the disk. Along with the database file, you will see a folder with a long string as the name. It will have three sub-folders as well. Delete the main folder along with the sub-folders.
Start the Microsoft Exchange Search and Microsoft Exchange Search Host Controller service.
On first server it solution helped.
But on second did not help.
I stopping services delete index folders and restart server - not helped.
Making Set-MailboxDatabase -IndexEnabled $false on DBs and stopping services delete index folders and restart server, Set-MailboxDatabase -IndexEnabled$true, stopping services delete index folders and restart server - not helped.
What different steps you are know to fix Content index state: Failed ?
Thank you.