diff --git a/src/azure-cli/azure/cli/command_modules/sql/_help.py b/src/azure-cli/azure/cli/command_modules/sql/_help.py
index 79928210472..d274aa688f0 100644
--- a/src/azure-cli/azure/cli/command_modules/sql/_help.py
+++ b/src/azure-cli/azure/cli/command_modules/sql/_help.py
@@ -242,7 +242,7 @@
 short-summary: Update long term retention settings for a database.
 examples:
   - name: Set long term retention for a database.
-    text: az sql db ltr-policy set -g mygroup -s myserver -n mydb --weekly-retention "P1W" --monthly-retention "P6M" --yearly-retention "P1Y" --week-of-year 26 --access-tier "Archive"
+    text: az sql db ltr-policy set -g mygroup -s myserver -n mydb --weekly-retention "P1W" --monthly-retention "P6M" --yearly-retention "P1Y" --week-of-year 26 --access-tier "Archive" --make-backups-immutable true
 """
 
 helps['sql db ltr-policy show'] = """
diff --git a/src/azure-cli/azure/cli/command_modules/sql/_params.py b/src/azure-cli/azure/cli/command_modules/sql/_params.py
index 5024ecd758d..77514acad26 100644
--- a/src/azure-cli/azure/cli/command_modules/sql/_params.py
+++ b/src/azure-cli/azure/cli/command_modules/sql/_params.py
@@ -1262,6 +1262,7 @@ def _configure_security_policy_storage_params(arg_ctx):
                 'monthly_retention',
                 'yearly_retention',
                 'week_of_year',
+                'make_backups_immutable',
                 'backup_storage_access_tier'])
 
         c.argument('weekly_retention',
@@ -1282,6 +1283,10 @@ def _configure_security_policy_storage_params(arg_ctx):
         c.argument('week_of_year',
                    help='The Week of Year, 1 to 52, in which to take the yearly LTR backup.')
 
+        c.argument('make_backups_immutable',
+                   help='Whether to make the LTR backups immutable.',
+                   arg_type=get_three_state_flag())
+
         c.argument('backup_storage_access_tier',
                    options_list=['--access-tier', '--backup-storage-access-tier'],
                    arg_type=get_enum_type(["Hot", "Archive"]),
diff --git a/src/azure-cli/azure/cli/command_modules/sql/custom.py b/src/azure-cli/azure/cli/command_modules/sql/custom.py
index 42413c2430f..55d1b133ec5 100644
--- a/src/azure-cli/azure/cli/command_modules/sql/custom.py
+++ b/src/azure-cli/azure/cli/command_modules/sql/custom.py
@@ -3003,6 +3003,7 @@ def update_long_term_retention(
         monthly_retention=None,
         yearly_retention=None,
         week_of_year=None,
+        make_backups_immutable=None,
         backup_storage_access_tier=None,
         **kwargs):
     '''
@@ -3014,6 +3015,13 @@ def update_long_term_retention(
     if yearly_retention and not week_of_year:
         raise CLIError('Please specify week of year for yearly retention.')
 
+    if make_backups_immutable:
+        confirmation = prompt_y_n("""Immutable LTR backups can't be changed or deleted.
+         You'll be charged for LTR backups for the full retention period.
+         Do you want to proceed?""")
+        if not confirmation:
+            return
+
     if backup_storage_access_tier and backup_storage_access_tier.lower() not in BACKUP_STORAGE_ACCESS_TIERS:
         raise CLIError('Please specify a valid backup storage access tier type for backup storage access tier.'
                        'See \'--help\' for more details.')
@@ -3026,6 +3034,8 @@ def update_long_term_retention(
 
     kwargs['week_of_year'] = week_of_year
 
+    kwargs['make_backups_immutable'] = make_backups_immutable
+
     kwargs['backup_storage_access_tier'] = backup_storage_access_tier
 
     policy = client.begin_create_or_update(
diff --git a/src/azure-cli/azure/cli/command_modules/sql/tests/latest/test_sql_commands.py b/src/azure-cli/azure/cli/command_modules/sql/tests/latest/test_sql_commands.py
index 6876419386a..cd3afdc7b89 100644
--- a/src/azure-cli/azure/cli/command_modules/sql/tests/latest/test_sql_commands.py
+++ b/src/azure-cli/azure/cli/command_modules/sql/tests/latest/test_sql_commands.py
@@ -1233,6 +1233,7 @@ def test_sql_db_long_term_retention(
             'monthly_retention': 'P1M',
             'yearly_retention': 'P2M',
             'week_of_year': 12,
+            'make_backups_immutable': 'False',
             'backup_storage_access_tier': 'Archive',
             'encryption_protector' : 'https://test123343strehan.vault.azure.net/keys/testk1/604b0e26e2a24eeaab30b80c8d7bb1c1',
             'keys' : '"https://test123343strehan.vault.azure.net/keys/k2/66f51a6e70f04067af8eaf77805e88b1" "https://test123343strehan.vault.azure.net/keys/testk1/604b0e26e2a24eeaab30b80c8d7bb1c1" "https://test123343strehan.vault.azure.net/keys/testk1/96151496df864e32aa62a3c1857b2931"',
@@ -1244,12 +1245,14 @@ def test_sql_db_long_term_retention(
             'sql db ltr-policy set -g {rg} -s {server_name} -n {database_name}'
             ' --weekly-retention {weekly_retention} --monthly-retention {monthly_retention}'
             ' --yearly-retention {yearly_retention} --week-of-year {week_of_year}'
+            ' --make-backups-immutable {make_backups_immutable}',
             ' --access-tier {backup_storage_access_tier}',
             checks=[
                 self.check('resourceGroup', '{rg}'),
                 self.check('weeklyRetention', '{weekly_retention}'),
                 self.check('monthlyRetention', '{monthly_retention}'),
                 self.check('yearlyRetention', '{yearly_retention}'),
+                self.check('makeBackupsImmutable', '{make_backups_immutable}'),
                 self.check('backupStorageAccessTier', '{backup_storage_access_tier}')])
 
         # test get long term retention policy on live database
@@ -1260,6 +1263,7 @@ def test_sql_db_long_term_retention(
                 self.check('weeklyRetention', '{weekly_retention}'),
                 self.check('monthlyRetention', '{monthly_retention}'),
                 self.check('yearlyRetention', '{yearly_retention}'),
+                self.check('makeBackupsImmutable', '{make_backups_immutable}'),
                 self.check('backupStorageAccessTier', '{backup_storage_access_tier}')])
 
         # test list long term retention backups for location