diff --git a/configuration/environments_scripts/reverse_proxy/files/var/www/cgi-bin/reverseProxyHealthcheck.sh b/configuration/environments_scripts/reverse_proxy/files/var/www/cgi-bin/reverseProxyHealthcheck.sh
index 31e81999d0f..4e48f65d550 100755
--- a/configuration/environments_scripts/reverse_proxy/files/var/www/cgi-bin/reverseProxyHealthcheck.sh
+++ b/configuration/environments_scripts/reverse_proxy/files/var/www/cgi-bin/reverseProxyHealthcheck.sh
@@ -1,6 +1,7 @@
 #!/bin/bash
 
-# Purpose: This script is the internal server status.
+# Purpose: This script identifies whether the instance the script runs on is in the same AZ as the archive.
+# The user it is installed on must have aws credentials that don't need mfa. Install to  /usr/share/httpd/.aws.
 
 outputMessage() {
     # parameter 1: the message to display on the site
@@ -14,12 +15,58 @@ status() {
     echo "Status: $1"
 }
 
+convert_ip_to_num() {
+    # $1: Ip4 address in 4 octets form, separated by 3 dots.
+    IFS=. read -r a b c d <<< "$1"
+    echo "$(( ( $a << 24 ) + ( $b << 16 ) +  ($c << 8 ) + ($d) ))"
+}
 SELF_IP=$( ec2-metadata --local-ipv4 | grep   -o "[0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+\>")
 curl --silent --location --fail "http://${SELF_IP}/internal-server-status" >/dev/null
-if [[ "$?" -eq 0 ]]; then
-    status "200"
-    outputMessage "failover at play: force healthy"
-else
+if [[ "$?" -ne 0 ]]; then
     status "500 Reverse proxy itself is unhealthy"
     outputMessage "Reverse proxy is unhealthy"
-fi
\ No newline at end of file
+    exit 0
+fi
+# The names of the variables in the macros file.
+ARCHIVE_IP_NAME="ARCHIVE_IP"
+ARCHIVE_FAILOVER_IP_NAME="ARCHIVE_FAILOVER_IP"
+PRODUCTION_IP_NAME="PRODUCTION_ARCHIVE"
+MACROS_PATH="/etc/httpd/conf.d/000-macros.conf"
+# The regex to extract the ip from a line ending in an ip.
+IP_REGEX="[0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+$"
+# Extracts which IP is in production.
+PRODUCTION_IP=$(sed -n -e  "s/^Define ${PRODUCTION_IP_NAME}\> \(.*\)$/\1/p" ${MACROS_PATH})
+SUBNET_MASK_SIZE_VAR_LOCATION="/var/cache/subnetMaskSize"
+if [[ ! -e "$SUBNET_MASK_SIZE_VAR_LOCATION" ]]; then
+    # Get subnet mask size
+    MY_AZ=$( ec2-metadata --availability-zone | grep -o "[a-zA-Z]\+-[a-zA-Z]\+-[0-9a-z]\+\>")
+    aws ec2 describe-subnets | jq -r '.Subnets[] | select( .AvailabilityZone =="'"$MY_AZ"'") | .CidrBlock | split("/") | .[1]' > $SUBNET_MASK_SIZE_VAR_LOCATION
+fi
+if [[ "$PRODUCTION_IP" == "\${${ARCHIVE_IP_NAME}}" ]]
+then
+    # Check if main archive is in the same az by comparing the network portion of the archive and this instance's IP, with the same bitmask.
+    MY_IP=$( ec2-metadata --local-ipv4 | grep   -o "[0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+\>")
+    MY_IP_VALUE="$(convert_ip_to_num "$MY_IP")"
+    MY_AZ_MASK_SIZE=$(cat $SUBNET_MASK_SIZE_VAR_LOCATION) 
+    # convert the value after the CIDR slash into a bitmask
+    BITMASK_VALUE=0
+    for i in $(seq $((31 - $MY_AZ_MASK_SIZE + 1)) 31); do
+        BITMASK_VALUE=$(($BITMASK_VALUE | (1 << i ) ))
+    done
+    MY_SUBNET_VALUE=$(($BITMASK_VALUE & $MY_IP_VALUE))
+    # Extract the actual IP of the archive
+    ARCHIVE_IP=$(grep -m 1 "^Define ${ARCHIVE_IP_NAME}\> .*"  ${MACROS_PATH} | grep -o "${IP_REGEX}")
+    ARCHIVE_IP_VALUE=$(convert_ip_to_num "$ARCHIVE_IP")
+    ARCHIVE_SUBNET_VALUE=$(($BITMASK_VALUE & $ARCHIVE_IP_VALUE ))  #A Aply the mask to the archive IP value.
+    if [[ "$ARCHIVE_SUBNET_VALUE"  -eq  "$MY_SUBNET_VALUE" ]]; then 
+        status "200"
+        outputMessage "Healthy: in the same az as the archive"
+    else 
+        status "503 Not in the same az"
+        outputMessage "Unhealthy: Not in the same az as the archive"
+    fi
+else
+    # We don't check if failover archive is in the same az
+    status "200"
+    outputMessage "failover at play: force healthy"
+fi