diff --git a/Backup_OpenStack_Vms_And_Volumes.sh b/Backup_OpenStack_Vms_And_Volumes.sh
index b47fa40..97c2a07 100644
--- a/Backup_OpenStack_Vms_And_Volumes.sh
+++ b/Backup_OpenStack_Vms_And_Volumes.sh
@@ -1,20 +1,21 @@
 #!/usr/bin/env bash
 
 #source openrc.sh
-#export OS_AUTH_TYPE=v3applicationcredential
-#export OS_AUTH_URL=https://auth.cloud.ovh.net/
-#export OS_IDENTITY_API_VERSION=3
-#export OS_INTERFACE=public
-#export OS_REGION_NAME="GRA11"
-#export OS_APPLICATION_CREDENTIAL_ID=
-#export OS_APPLICATION_CREDENTIAL_SECRET=
+export OS_AUTH_TYPE=v3applicationcredential
+export OS_AUTH_URL=https://auth.cloud.ovh.net/
+export OS_IDENTITY_API_VERSION=3
+export OS_INTERFACE=public
+export OS_REGION_NAME="GRA11"
+export OS_APPLICATION_CREDENTIAL_ID=
+export OS_APPLICATION_CREDENTIAL_SECRET=
+export PROJECT_ID=
 
 #Daily Retention (Nb of months)
-export DAILY_RETENTION=7
+export DAILY_RETENTION=20
 
 #Monthly Retention (Nb of months)
 # 0 =  disable monthly backup
-export MONTHLY_RETENTION=0
+export MONTHLY_RETENTION=12
 # DAY OF MOUNTH TO EXECUTE MONTHLY BACKUP
 # 01 ... 30 31
 export DAY_MONTHLY_BACKUP=01
@@ -29,6 +30,9 @@ export DAY_OF_YEARLY_BACKUP=01
 # 01:january... 12:December
 export MONTH_OF_YEARLY_BACKUP=01
 
+# Number of backup instances to keep
+export MAX_KEEP_BACKUP_INSTANCES=100
+
 #Set TimeZone
 export TZ=Europe/Paris
 
@@ -166,7 +170,7 @@ function backup(){
 
         _info_action " ------> [Instance : ${SERVER}] ---> Launching the Snapshot of the instance ${SERVER} to ${BCK_SERVER}"
         BCK_INSTANCES_LIST+=(${BCK_SERVER})
-        ${OPENSTACK} server backup create --name ${BCK_SERVER} ${SERVER}
+        ${OPENSTACK} server backup create --rotate ${MAX_KEEP_BACKUP_INSTANCES} --name ${BCK_SERVER} ${SERVER}
 
         _info_blue " ------> [Instance : ${SERVER}] === === End of the backup === ==="
     done
@@ -179,7 +183,7 @@ function check_backup(){
         _info "================================================================================"
 
         MAXIMUM_TIMESTAMP=`date -d '+'${CHECK_BACKUP_DELAY}' seconds' '+%s'`
-        
+
         echo ""
         _info " => Checking the backup of volumes"
         for BCK_VOLUME in "${BCK_VOLUMES_LIST[@]}"
@@ -228,7 +232,7 @@ function manage_retention(){
     _info "================================================================================"
     _info " - Manage Backup Retention"
     _info "================================================================================"
-    
+
     echo ""
     _info " ====> Manage Retention for Backup Volumes <===="
     ALL_BCK_VOLUMES=$(${OPENSTACK} volume backup list -f json)
@@ -349,7 +353,7 @@ function manage_retention(){
 function job_details(){
     _info_blue "#######################################################################################"
     _info_blue "Starting Backup Job "
-    PJT_DESC=$(${OPENSTACK} project show ${OS_TENANT_ID} -f json | ${JQ} -r '.description')
+    PJT_DESC=$(${OPENSTACK} project show ${PROJECT_ID} -f json | ${JQ} -r '.description')
     _info_blue " ---> Project Description : ${PJT_DESC}"
     _info_blue " ---> Region : ${OS_REGION_NAME}"
 
@@ -369,7 +373,7 @@ function job_details(){
     else
         _info_blue "       --> Monthly Retention : Disabled"
     fi
-    
+
     if [ "${YEARLY_RETENTION}" != "0" ]; then
         _info_blue "       --> Yearly Retention : ${YEARLY_RETENTION} Year(s)"
     else
@@ -402,7 +406,6 @@ function _warning(){
 
 function main() {
     job_details
-    exit
     check_prerequistes
     backup
     check_backup
@@ -411,4 +414,4 @@ function main() {
 
 main "$@"
 
-exit ${EXIT}
\ No newline at end of file
+exit ${EXIT}