diff --git a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlFileBackedHTTPMetadataResolver.java b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlFileBackedHTTPMetadataResolver.java
index aca3d8bee..c5d64dc5b 100644
--- a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlFileBackedHTTPMetadataResolver.java
+++ b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlFileBackedHTTPMetadataResolver.java
@@ -15,8 +15,10 @@
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
+import java.time.Duration;
 import java.time.Instant;
 
+import static edu.internet2.tier.shibboleth.admin.util.DurationUtility.toPositiveNonZeroDuration;
 import static edu.internet2.tier.shibboleth.admin.util.DurationUtility.toTimeDuration;
 import static edu.internet2.tier.shibboleth.admin.util.TokenPlaceholderResolvers.placeholderResolverService;
 
@@ -48,7 +50,9 @@ public OpenSamlFileBackedHTTPMetadataResolver(ParserPool parserPool,
                         sourceResolver.getReloadableMetadataResolverAttributes(), parserPool);
 
         this.setBackupFile(placeholderResolverService().resolveValueFromPossibleTokenPlaceholder(sourceResolver.getBackingFile()));
-        this.setBackupFileInitNextRefreshDelay(toTimeDuration(placeholderResolverService().resolveValueFromPossibleTokenPlaceholder(sourceResolver.getBackupFileInitNextRefreshDelay())));
+        this.setBackupFileInitNextRefreshDelay(toPositiveNonZeroDuration(
+                        placeholderResolverService().resolveValueFromPossibleTokenPlaceholder(sourceResolver.getBackupFileInitNextRefreshDelay()),
+                        Duration.ofSeconds(5)));
         if (sourceResolver.getInitializeFromBackupFile() != null) {
             this.setInitializeFromBackupFile(sourceResolver.getInitializeFromBackupFile());
         }
diff --git a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlMetadataResolverConstructorHelper.java b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlMetadataResolverConstructorHelper.java
index 942a92380..548c14eb6 100644
--- a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlMetadataResolverConstructorHelper.java
+++ b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/domain/resolvers/opensaml/OpenSamlMetadataResolverConstructorHelper.java
@@ -4,11 +4,13 @@
 import edu.internet2.tier.shibboleth.admin.ui.domain.resolvers.HttpMetadataResolverAttributes;
 import edu.internet2.tier.shibboleth.admin.ui.domain.resolvers.ReloadableMetadataResolverAttributes;
 import net.shibboleth.utilities.java.support.xml.ParserPool;
-import org.apache.commons.lang3.StringUtils;
 import org.opensaml.saml.metadata.resolver.MetadataResolver;
 import org.opensaml.saml.metadata.resolver.impl.AbstractDynamicMetadataResolver;
 import org.opensaml.saml.metadata.resolver.impl.AbstractReloadingMetadataResolver;
 
+import java.time.Duration;
+
+import static edu.internet2.tier.shibboleth.admin.util.DurationUtility.toPositiveNonZeroDuration;
 import static edu.internet2.tier.shibboleth.admin.util.DurationUtility.toTimeDuration;
 import static edu.internet2.tier.shibboleth.admin.util.TokenPlaceholderResolvers.placeholderResolverService;
 
@@ -102,16 +104,14 @@ public static void updateOpenSamlMetadataResolverFromReloadableMetadataResolverA
                         .setExpirationWarningThreshold(toTimeDuration(placeholderResolverService()
                                 .resolveValueFromPossibleTokenPlaceholder(attributes.getExpirationWarningThreshold())));
             }
-            if (attributes.getMaxRefreshDelay() != null) {
-                reloadingMetadataResolver.setMaxRefreshDelay(toTimeDuration(placeholderResolverService()
-                        .resolveValueFromPossibleTokenPlaceholder(attributes.getMaxRefreshDelay())));
-            }
-            if (attributes.getMinRefreshDelay() != null) {
-                String minRefreshString = placeholderResolverService().resolveValueFromPossibleTokenPlaceholder(attributes.getMinRefreshDelay());
-                if (StringUtils.isNotBlank(minRefreshString)) {
-                    reloadingMetadataResolver.setMinRefreshDelay(toTimeDuration(minRefreshString));
-                }
-            }
+
+            // Open SAML 4.x libarry requires values non-null, greater than zero for min and max refresh rates
+            reloadingMetadataResolver.setMaxRefreshDelay(toPositiveNonZeroDuration(
+                            placeholderResolverService().resolveValueFromPossibleTokenPlaceholder(attributes.getMaxRefreshDelay()),
+                            Duration.ofHours(4)));
+            reloadingMetadataResolver.setMinRefreshDelay(toPositiveNonZeroDuration(
+                            placeholderResolverService().resolveValueFromPossibleTokenPlaceholder(attributes.getMinRefreshDelay()),
+                            Duration.ofMinutes(5)));
 
             if (attributes.getResolveViaPredicatesOnly() != null) {
                 reloadingMetadataResolver.setResolveViaPredicatesOnly(attributes.getResolveViaPredicatesOnly());
diff --git a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/util/DurationUtility.java b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/util/DurationUtility.java
index ccd756244..0d531321a 100644
--- a/backend/src/main/java/edu/internet2/tier/shibboleth/admin/util/DurationUtility.java
+++ b/backend/src/main/java/edu/internet2/tier/shibboleth/admin/util/DurationUtility.java
@@ -41,4 +41,9 @@ public static java.time.Duration toTimeDuration(String xmlDuration) {
         long value = toMillis(xmlDuration);
         return java.time.Duration.ofMillis(value);
     }
+
+    public static java.time.Duration toPositiveNonZeroDuration (String xmlDuration, java.time.Duration defaultDuration) {
+        long value = toMillis(xmlDuration);
+        return value > 0 ? java.time.Duration.ofMillis(value) : defaultDuration;
+    }
 }
\ No newline at end of file
diff --git a/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/service/JPAMetadataResolverServiceImplTests.groovy b/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/service/JPAMetadataResolverServiceImplTests.groovy
index 5dbd8fedc..594ee6750 100644
--- a/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/service/JPAMetadataResolverServiceImplTests.groovy
+++ b/backend/src/test/groovy/edu/internet2/tier/shibboleth/admin/ui/service/JPAMetadataResolverServiceImplTests.groovy
@@ -94,10 +94,8 @@ class JPAMetadataResolverServiceImplTests extends AbstractBaseDataJpaTest {
       <saml:Attribute xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion" Name="http://shibboleth.net/ns/attributes/releaseAllValues" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri">
         <saml:AttributeValue>givenName</saml:AttributeValue>
         <saml:AttributeValue>employeeNumber</saml:AttributeValue>
+        <saml2:AttributeValue xmlns:saml2="urn:oasis:names:tc:SAML:2.0:assertion" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="xsd:string">testme</saml2:AttributeValue>
       </saml:Attribute>
-      <saml2:Attribute xmlns:saml2="urn:oasis:names:tc:SAML:2.0:assertion" Name="http://shibboleth.net/ns/attributes/releaseAllValues" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri">
-        <saml2:AttributeValue xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="xsd:string">testme</saml2:AttributeValue>
-      </saml2:Attribute>
     </mdattr:EntityAttributes>
   </md:Extensions>
   <md:SPSSODescriptor protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol">
@@ -132,7 +130,9 @@ class JPAMetadataResolverServiceImplTests extends AbstractBaseDataJpaTest {
         assert metadataResolverRepository.findAll().size() > 0
         def ed = metadataResolver.resolveSingle(new CriteriaSet(new EntityIdCriterion('http://test.scaldingspoon.org/test1')))
         def resultString = openSamlObjects.marshalToXmlString(ed)
+        println("RESULTSTRING:")
         println(resultString)
+        // line 99 above being added to release all values, not its own thing
         def diff = DiffBuilder.compare(Input.fromString(expectedXML)).withTest(Input.fromString(resultString)).ignoreComments().ignoreWhitespace().build()
         !diff.hasDifferences()
     }