Thank you for this reply
So , yes , Instance A for restore data , and i leave the old data age until the end of the retention
Instance B goes to Commcell B for new backup
In comparaison with CCM , the finality its the same ??
If i use CCM to move the client , the second step its really a new full backup (not a Full incremental ?? )
And if i use CCM and move the client in Commcell B, quid for restore data ? , the Commcell B request the Commcell A for the ChunkData and Index , its that ??
Because i want to know what's the quickest solution , and if possible , i dont want initiate a New Full Backup..its a big client and a new full backup its very too too long :/