To reduce load on our primary exchange server/DC, which was operating extremely slowly, I moved the main file store to our secondary DC (also a GC server) which also acts as a SQL server and print server. I have a third server to take over as our exchange server, which I'm currently setting up, and a NAS box which I've bought as a backup to disk folder. The third server won't be ready for a week or so though, it's a swing upgrade.
The exchange server has improved, with less timeouts responding, but the secondary DC is now reporting a large number of warnings (1 every 2 minutes), below.
I haven't yet copied back all the files as I don't want to have a knee-jerk reaction to this issue. I've found some MS articles on this which suggest modifying the registry. What's causing this and is registry change the best method?
Event Type: Warning
Event Source: Srv
Event Category: None
Event ID: 2021
The server was unable to allocate a work item 2 times in the last 60 seconds.