Veeam Backup
Veeam Backup & Replication setup and fixes.
Veeam Upgrade
https://www.reddit.com/r/Veeam/comments/1b84qg4/migrate_11_to_12_on_new_hardware/
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Disable all jobs, perform necessary backups and snapshots of existing v11 server
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Perform upgrade to v12
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Post upgrade, take configuration backup
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On new v12 server, perform configuration restore
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Enable jobs
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Decom old VBR server/DB.
Or you can install the same v11 version on the new server, perform the config backup and restore first, then do an in place upgrade of the new server to v12.
Make sure you upgrade any VeeamONE and Enterprise Manager first.
Licensing, you can use the same license on both servers as long as its part of the migration process...only running the same license on two different VBR server in production at the same time is an issue.
Veeam Duplicate UUID
This is to bypass the UUID check if you have restored an old back to new hardware for example a laptop or physical PC.
REGEDIT
To ‘EnableSystemUuidFailover’ key should be added on each Veeam Agent host with non-unique ID.
This is the key enabling Veeam failover logic.
Name: EnableSystemUuidFailover
Path: HKLM\SOFTWARE\Veeam\
Type: DWORD
Value: 1
Then a unique ID should be assigned manually on each Agent station.
Another Veeam registry should be added on each host for it:
Name: SystemUuid
Path: HKLM\SOFTWARE\Veeam\
Type: REG_SZ
Value: {a custom UUID}
Custom UUID should correspond with the standard UUID format rules, brackets are required.
You can use some online generator for it (https://www.uuidgenerator.net/ ) or put some your own strings there.
Rescan protection group and you are deployed now
Disable "Windows recovery image file not found" warning
Value: 1