diff --git a/imap_processing/cdf/config/imap_idex_l1a_variable_attrs.yaml b/imap_processing/cdf/config/imap_idex_l1a_variable_attrs.yaml
index 8765d2e6a..a95396315 100644
--- a/imap_processing/cdf/config/imap_idex_l1a_variable_attrs.yaml
+++ b/imap_processing/cdf/config/imap_idex_l1a_variable_attrs.yaml
@@ -214,7 +214,7 @@ checksum:
   FIELDNAM: Checksum
   UNITS: " "
 
-idx__sci0aid:
+aid:
   <<: *trigger_base
   CATDESC: Accountability identifier for this event
   FIELDNAM: Accountability identifier
diff --git a/imap_processing/idex/idex_l1a.py b/imap_processing/idex/idex_l1a.py
index c3d735d46..518684d8d 100644
--- a/imap_processing/idex/idex_l1a.py
+++ b/imap_processing/idex/idex_l1a.py
@@ -651,8 +651,15 @@ def process(self) -> Dataset | None:
         # Gather the huge amount of metadata info
         trigger_vars = {}
         for var, value in self.telemetry_items.items():
-            trigger_vars[var] = xr.DataArray(
-                name=var,
+            # SCI0AID is not updated properly. To this end, TXHDRFSWAIDCOPY must be
+            # used as the proper AID.
+            if var == "idx__sci0aid":
+                continue
+            # rename idx__txhdrfswaidcopy to aid for better readability in the final
+            # dataset
+            var_name = "aid" if var == "idx__txhdrfswaidcopy" else var
+            trigger_vars[var_name] = xr.DataArray(
+                name=var_name,
                 data=[value],
                 dims=("epoch"),
                 attrs=idex_attrs.get_variable_attributes(var),
diff --git a/imap_processing/idex/idex_l1b.py b/imap_processing/idex/idex_l1b.py
index 5824d134a..c271af1f8 100644
--- a/imap_processing/idex/idex_l1b.py
+++ b/imap_processing/idex/idex_l1b.py
@@ -146,7 +146,7 @@ def idex_l1b(l1a_dataset: xr.Dataset) -> xr.Dataset:
         l1a_dataset["idx__txhdrtrigid"].data, idex_attrs
     )
     # Create l1b Dataset
-    prefixes = ["shcoarse", "shfine", "time_high_sample", "time_low_sample"]
+    prefixes = ["shcoarse", "shfine", "time_high_sample", "time_low_sample", "aid"]
     data_vars = (
         processed_vars
         | waveforms_converted
diff --git a/imap_processing/tests/idex/test_idex_l0.py b/imap_processing/tests/idex/test_idex_l0.py
index 736c0565d..ea4ebf12a 100644
--- a/imap_processing/tests/idex/test_idex_l0.py
+++ b/imap_processing/tests/idex/test_idex_l0.py
@@ -14,7 +14,7 @@ def test_idex_decom_length(decom_test_data_sci: xr.Dataset):
     decom_test_data_sci : xarray.Dataset
         The dataset to test with
     """
-    assert len(decom_test_data_sci) == 110
+    assert len(decom_test_data_sci) == 109
 
 
 def test_idex_decom_event_num(decom_test_data_sci: xr.Dataset):
diff --git a/imap_processing/tests/idex/test_idex_l1a.py b/imap_processing/tests/idex/test_idex_l1a.py
index b80e960a6..2ef70be8e 100644
--- a/imap_processing/tests/idex/test_idex_l1a.py
+++ b/imap_processing/tests/idex/test_idex_l1a.py
@@ -156,6 +156,7 @@ def test_validate_l1a_idex_data_variables(
         "Ion Grid": "Ion_Grid",
         "Time (high sampling)": "time_high_sample_rate",
         "Time (low sampling)": "time_low_sample_rate",
+        "idx__txhdrfswaidcopy": "aid",
     }
     # The Engineering data is converting to UTC, and the SDC is converting to J2000,
     # for 'epoch' and 'Timestamp' so this test is using the raw time value 'SCHOARSE' to
@@ -168,6 +169,8 @@ def test_validate_l1a_idex_data_variables(
         "event",
         "Time (high sampling)",
         "Time (low sampling)",
+        "IDX__SCI0AID",  # This is dropped because it is invalid
+        "IDX__TXHDRFSWAIDCOPY",  # this is renamed to aid
     ]
 
     # loop through all keys from the l1a example dict
diff --git a/imap_processing/tests/idex/test_idex_l1b.py b/imap_processing/tests/idex/test_idex_l1b.py
index f113b595a..2b95b28dc 100644
--- a/imap_processing/tests/idex/test_idex_l1b.py
+++ b/imap_processing/tests/idex/test_idex_l1b.py
@@ -325,6 +325,8 @@ def test_validate_l1b_idex_data_variables(
         "FIFODelay_M",
         "HSPosttriggerBlocks",
     ]
+    # assert that "aid" is in l1b
+    assert "aid" in l1b_dataset, "The array 'aid' is missing from the l1b dataset."
     # select only the first n events
     l1b_example_data = l1b_example_data.isel(
         event=np.arange(l1b_dataset.sizes["epoch"])