diff --git a/oam/install_scripts/columnstore-post-install.in b/oam/install_scripts/columnstore-post-install.in
index 6a9caafc7..d139d9733 100755
--- a/oam/install_scripts/columnstore-post-install.in
+++ b/oam/install_scripts/columnstore-post-install.in
@@ -281,6 +281,22 @@ if [ ! -z "$MCS_USE_S3_STORAGE" ] && [ $MCS_USE_S3_STORAGE -eq 1 ]; then
       sed -i "s|# endpoint =.*|endpoint = $MCS_S3_ENDPOINT|" /etc/columnstore/storagemanager.cnf
       sed -i "s|# aws_access_key_id =.*|aws_access_key_id = $MCS_S3_ACCESS_KEY_ID|" /etc/columnstore/storagemanager.cnf
       sed -i "s|# aws_secret_access_key =.*|aws_secret_access_key = $MCS_S3_SECRET_ACCESS_KEY|" /etc/columnstore/storagemanager.cnf
+      testS3Connection
+      if [ $? -ne 0 ]; then
+        sed -i "s|endpoint =.*|# endpoint = |" /etc/columnstore/storagemanager.cnf
+        sed -i "s|aws_access_key_id =.*|# aws_access_key_id = |" /etc/columnstore/storagemanager.cnf
+        sed -i "s|aws_secret_access_key =.*|# aws_secret_access_key = |" /etc/columnstore/storagemanager.cnf
+        echo "There was an error checking the storagemanager.cnf parameters."
+        echo "The specified user must have GET, PUT, HEAD, and DELETE permissions to the bucket."
+        echo "Verify the following environmental variables are correct:"
+        echo "MCS_S3_BUCKET"
+        echo "MCS_S3_ENDPOINT"
+        echo "MCS_S3_ACCESS_KEY_ID"
+        echo "MCS_S3_SECRET_ACCESS_KEY"
+        echo "MCS_S3_REGION"
+        echo "After environmental variables are fixed, run command: columnstore-post-install"
+        exit 1
+      fi
   fi  
 fi