diff --git a/src/DIRAC/Core/scripts/dirac_configure.py b/src/DIRAC/Core/scripts/dirac_configure.py
index d54a5a207aa..dbc8c0dde6d 100755
--- a/src/DIRAC/Core/scripts/dirac_configure.py
+++ b/src/DIRAC/Core/scripts/dirac_configure.py
@@ -76,6 +76,7 @@ def __init__(self):
         self.outputFile = ""
         self.skipVOMSDownload = False
         self.extensions = ""
+        self.legacyExchangeApiKey = ""
 
     def setGateway(self, optionValue):
         self.gatewayServer = optionValue
@@ -174,6 +175,12 @@ def setIssuer(self, optionValue):
         DIRAC.gConfig.setOptionValue("/DIRAC/Security/Authorization/issuer", self.issuer)
         return DIRAC.S_OK()
 
+    def setLegacyExchangeApiKey(self, optionValue):
+        self.legacyExchangeApiKey = optionValue
+        Script.localCfg.addDefaultEntry("/DiracX/LegacyExchangeApiKey", self.legacyExchangeApiKey)
+        DIRAC.gConfig.setOptionValue(cfgInstallPath("LegacyExchangeApiKey"), self.vo)
+        return DIRAC.S_OK()
+
 
 def _runConfigurationWizard(setups, defaultSetup):
     """The implementation of the configuration wizard"""
@@ -361,6 +368,9 @@ def runDiracConfigure(params):
     Script.registerSwitch("n:", "SiteName=", "Set <sitename> as DIRAC Site Name", params.setSiteName)
     Script.registerSwitch("N:", "CEName=", "Set <cename> as Computing Element name", params.setCEName)
     Script.registerSwitch("V:", "VO=", "Set the VO name", params.setVO)
+    Script.registerSwitch(
+        "K:", "LegacyExchangeApiKey=", "Set the Api Key to talk to DiracX", params.setLegacyExchangeApiKey
+    )
 
     Script.registerSwitch("W:", "gateway=", "Configure <gateway> as DIRAC Gateway for the site", params.setGateway)
 
diff --git a/src/DIRAC/FrameworkSystem/Service/ProxyManagerHandler.py b/src/DIRAC/FrameworkSystem/Service/ProxyManagerHandler.py
index 35847445dcd..0294d4bba21 100644
--- a/src/DIRAC/FrameworkSystem/Service/ProxyManagerHandler.py
+++ b/src/DIRAC/FrameworkSystem/Service/ProxyManagerHandler.py
@@ -7,7 +7,9 @@
       :caption: ProxyManager options
 """
 
-from DIRAC import gLogger, S_OK, S_ERROR
+import os
+import requests
+from DIRAC import gLogger, S_OK, S_ERROR, gConfig
 from DIRAC.Core.DISET.RequestHandler import RequestHandler, getServiceOption
 from DIRAC.Core.Security import Properties
 from DIRAC.Core.Utilities.ObjectLoader import ObjectLoader
@@ -411,39 +413,32 @@ def export_getVOMSProxyWithToken(self, userDN, userGroup, requestPem, requiredLi
 
     def export_exchangeProxyForToken(self):
         """Exchange a proxy for an equivalent token to be used with diracx"""
-        try:
-            from diracx.routers.auth import (  # pylint: disable=import-error
-                AuthSettings,
-                create_token,
-                TokenResponse,
-            )  # pylint: disable=import-error
-
-            authSettings = AuthSettings()
-
-            from uuid import uuid4
-
-            credDict = self.getRemoteCredentials()
-            vo = Registry.getVOForGroup(credDict["group"])
-            payload = {
-                "sub": f"{vo}:{credDict['username']}",
-                "vo": vo,
-                "aud": authSettings.token_audience,
-                "iss": authSettings.token_issuer,
-                "dirac_properties": list(
-                    set(credDict.get("groupProperties", [])) | set(credDict.get("properties", []))
-                ),
-                "jti": str(uuid4()),
+
+        from diracx.core.preferences import get_diracx_preferences
+
+        apiKey = gConfig.getValue("/DiracX/LegacyExchangeApiKey")
+        if not apiKey:
+            return S_ERROR("Missing mandatory /DiracX/LegacyExchangeApiKey configuration")
+
+        diracxUrl = get_diracx_preferences().url
+
+        credDict = self.getRemoteCredentials()
+        vo = Registry.getVOForGroup(credDict["group"])
+        dirac_properties = list(set(credDict.get("groupProperties", [])) | set(credDict.get("properties", [])))
+        group = credDict["group"]
+        scopes = [f"vo:{vo}", f"group:{group}", [f"property:{prop}" for prop in dirac_properties]]
+
+        r = requests.get(
+            f"{diracxUrl}/auth/legacy-exchange",
+            params={
                 "preferred_username": credDict["username"],
-                "dirac_group": credDict["group"],
-            }
-            return S_OK(
-                TokenResponse(
-                    access_token=create_token(payload, authSettings),
-                    expires_in=authSettings.access_token_expire_minutes * 60,
-                ).dict()
-            )
-        except Exception as e:
-            return S_ERROR(f"Could not get token: {e!r}")
+                "scopes": " ".join(scopes),
+            },
+            headers={"Authorization": f"Bearer {apiKey}"},
+        )
+
+        r.raise_for_status()
+        return S_OK(r.json())
 
 
 class ProxyManagerHandler(ProxyManagerHandlerMixin, RequestHandler):
diff --git a/tests/CI/docker-compose.yml b/tests/CI/docker-compose.yml
index 24273150ea4..35a5a7d31f3 100644
--- a/tests/CI/docker-compose.yml
+++ b/tests/CI/docker-compose.yml
@@ -152,6 +152,8 @@ services:
       - DIRACX_DB_URL_JOBDB=mysql+aiomysql://Dirac:Dirac@mysql/JobDB
       - DIRACX_SERVICE_AUTH_TOKEN_KEY=file:///signing-key/rs256.key
       - DIRACX_SERVICE_AUTH_ALLOWED_REDIRECTS=["http://diracx:8000/docs/oauth2-redirect"]
+      # Obtained with echo 'InsecureChangeMe' | base64 -d | openssl sha512
+      - DIRACX_LEGACY_EXCHANGE_HASHED_API_KEY=07cddf6948d316ac9d186544dc3120c4c6697d8f994619665985c0a5bf76265a
     ports:
       - 8000:8000
     depends_on:
diff --git a/tests/Jenkins/dirac_ci.sh b/tests/Jenkins/dirac_ci.sh
index 46d15d06f48..d4518e4aeee 100644
--- a/tests/Jenkins/dirac_ci.sh
+++ b/tests/Jenkins/dirac_ci.sh
@@ -135,7 +135,7 @@ installSite() {
 
   echo "==> Done installing, now configuring"
   source "${SERVERINSTALLDIR}/bashrc"
-  if ! dirac-configure --cfg "${SERVERINSTALLDIR}/install.cfg" "${DEBUG}"; then
+  if ! dirac-configure --cfg "${SERVERINSTALLDIR}/install.cfg" --LegacyExchangeApiKey='InsecureChangeMe' "${DEBUG}"; then
     echo "ERROR: dirac-configure failed" >&2
     exit 1
   fi