Just posting this in case anyone else running Sophos Central Endpoint AV experiences the same issue. We were experiencing the following error on multiple servers:
VSSControl: Failed to freeze guest over network, wait timeout
We also found warnings in our app logs showing the following:
A VSS writer has rejected an event with error 0x800423f2, The writer's timeout expired between the Freeze and Thaw events.
. Changes that the writer made to the writer components while handling the event will not be available to the requester. Check the event log for related events from the application hosting the VSS writer.
The issue was resolved by disabling the Sophos Health Service. If you run this from an admin command prompt - "fltmc instances" you will see Sophos accessing VSS. Another Veeam customer also has the same problem - post272884.html#p272884
FYI, this thread has a lot of background information - https://community.spiceworks.com/topic/ ... 713?page=1
At the moment Sophos and speaking with Microsoft about the issue. According to Sophos they are accessing VSS correctly and the problem should not be happening. Hopefully between them and MS they can resolve the issue.