We had a failure on one of our ESXI hosts earlier in the week and since then we have had most (not all) of our replica jobs failing with errors such as "Preparing replica VM Error: Unable to communicate with the remote host, since it is disconnected. Error: Unable to communicate with the remote host, since it is disconnected." We had this (or similar problem) before after we migrated servers and the only solution to properly clear the error was to re-create the replica job again. We have a backup job running and for most of jobs they seem to be running ok, so any ideas why the replica fails and the backup runs ok. I don't really want to re-create all the replicas from scratch again as last time we did that we just took the hit of loosing data in the replicas, but as we have had a problem with one of our ESXI hosts (we think it was faulty memory) I don't really want to be deleting replicas & trying to re-run the jobs when we have something that is unreliable at the moment.

Does anyone have any ideas?