Jobs fail with "The host is not licensed for this feature" error message after upgrade to Veeam Backup & Replication 9.5 Update 4

Challenge

After upgrading Veeam Backup & Replication to version 9.5 Update 4, backups of VMs from ESXi 5.0 and 5.1 licensed with VMware Essentials licensing start to fail with the following error: "VDDK error: 16064 (The host is not licensed for this feature)".

Cause

Regression in the VMware VDDK 5.5.5 specific to vSphere ESXi 5.0 or 5.1 hosts which are licensed with the VMware Essentials license.

Solution

 Please install a private fix to address this issue:

1. Depends on you version please download private fix and extract on the Veeam Backup Server. 
2. Right-click on the installation file and click "Run as administrator"
3. Go through the wizard to install private fix.
4. Relaunch Veeam Backup Console and let Veeam automatically update hosts added to the Veeam server.

NOTE: There is no need to stop Veeam services.
 

More Information

[[DOWNLOAD|DOWNLOAD PRIVATE FIX FOR UPDATE 4|https://www.veeam.com/download_add_packs/vmware-esx-backup/kb2875]]
MD5 for veeam_backup_9.5.4.2615.update4_kb2875.exe: b02cd8c24b68a750eff9bc9e734dcec8
SHA-1 for veeam_backup_9.5.4.2615.update4_kb2875.exe: b38b3e4e985239e6369356de4273f0001c00e607

[[DOWNLOAD|DOWNLOAD PRIVATE FIX FOR UPDATE 4a|https://storage.veeam.com/Fix_158670_1b85ac7bd1.zip]]
MD5 for veeam_backup_9.5.4.2753.update4a_kb2875.exe: bb553daf9515178131e4017f48295adc
SHA-1 veeam_backup_9.5.4.2753.update4a_kb2875.exe for 191bcd10bf4682ac0713bf5a53189ef2245cd5eb

[[DOWNLOAD|DOWNLOAD PRIVATE FIX FOR UPDATE 4b|https://www.veeam.com/download_add_packs/vmware-esx-backup/kb2875_1]]
MD5 for Fix_158670_db7f686506.zip: b762bbaf292719572fccc0230dbee6f3
SHA-1 for Fix_158670_db7f686506.zip: for d6652bcc729d1c961eb823acef1ee078cad60ca2