Written by James McDonald

November 29, 2023

If you have Veeam backup failing with the Updating BCD failed with Cannot update SafeBoot flag and SentinelOne is installed. Try the following from a veeam forum post

29/11/2023 2:35:29 PM :: Processing TGN-HO-DC02 Error: VSSControl: -2147467259 Backup job failed.
Cannot create a shadow copy of the volumes containing writer's data.
Cannot prepare the [NTDS] data to a subsequent restore operation.
Cannot process NTDS data.
Updating BCD failed.
Cannot update SafeBoot flag.

https://forums.veeam.com/post503754.html#p503754

cd "C:\Program Files\SentinelOne\Sentinel Agent 22.3.5.887"

sentinelctl config antiTamperingConfig.allowSignedKnownAndVerifiedToSafeBoot true -k "passphrase"

# check it
sentinelctl config antiTamperingConfig.allowSignedKnownAndVerifiedToSafeBoot

reboot

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