diff --git a/services/preview/logic/mgmt/2018-07-01-preview/logic/integrationaccountagreements.go b/services/preview/logic/mgmt/2018-07-01-preview/logic/integrationaccountagreements.go
index 1db17be121b6..5a8c1329b124 100644
--- a/services/preview/logic/mgmt/2018-07-01-preview/logic/integrationaccountagreements.go
+++ b/services/preview/logic/mgmt/2018-07-01-preview/logic/integrationaccountagreements.go
@@ -100,8 +100,8 @@ func (client IntegrationAccountAgreementsClient) CreateOrUpdate(ctx context.Cont
 												Chain: []validation.Constraint{{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.ReceiveAgreement.ProtocolSettings.MdnSettings.NeedMDN", Name: validation.Null, Rule: true, Chain: nil},
 													{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.ReceiveAgreement.ProtocolSettings.MdnSettings.SignMDN", Name: validation.Null, Rule: true, Chain: nil},
 													{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.ReceiveAgreement.ProtocolSettings.MdnSettings.SendMDNAsynchronously", Name: validation.Null, Rule: true, Chain: nil},
-													{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.ReceiveAgreement.ProtocolSettings.MdnSettings.SignOutboundMDNIfOptional", Name: validation.Null, Rule: true, Chain: nil},
-													{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.ReceiveAgreement.ProtocolSettings.MdnSettings.SendInboundMDNToMessageBox", Name: validation.Null, Rule: true, Chain: nil},
+													{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.ReceiveAgreement.ProtocolSettings.MdnSettings.SignOutboundMdnIfOptional", Name: validation.Null, Rule: true, Chain: nil},
+													{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.ReceiveAgreement.ProtocolSettings.MdnSettings.SendInboundMdnToMessageBox", Name: validation.Null, Rule: true, Chain: nil},
 												}},
 											{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.ReceiveAgreement.ProtocolSettings.SecuritySettings", Name: validation.Null, Rule: true,
 												Chain: []validation.Constraint{{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.ReceiveAgreement.ProtocolSettings.SecuritySettings.OverrideGroupSigningCertificate", Name: validation.Null, Rule: true, Chain: nil},
@@ -161,8 +161,8 @@ func (client IntegrationAccountAgreementsClient) CreateOrUpdate(ctx context.Cont
 													Chain: []validation.Constraint{{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.SendAgreement.ProtocolSettings.MdnSettings.NeedMDN", Name: validation.Null, Rule: true, Chain: nil},
 														{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.SendAgreement.ProtocolSettings.MdnSettings.SignMDN", Name: validation.Null, Rule: true, Chain: nil},
 														{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.SendAgreement.ProtocolSettings.MdnSettings.SendMDNAsynchronously", Name: validation.Null, Rule: true, Chain: nil},
-														{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.SendAgreement.ProtocolSettings.MdnSettings.SignOutboundMDNIfOptional", Name: validation.Null, Rule: true, Chain: nil},
-														{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.SendAgreement.ProtocolSettings.MdnSettings.SendInboundMDNToMessageBox", Name: validation.Null, Rule: true, Chain: nil},
+														{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.SendAgreement.ProtocolSettings.MdnSettings.SignOutboundMdnIfOptional", Name: validation.Null, Rule: true, Chain: nil},
+														{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.SendAgreement.ProtocolSettings.MdnSettings.SendInboundMdnToMessageBox", Name: validation.Null, Rule: true, Chain: nil},
 													}},
 												{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.SendAgreement.ProtocolSettings.SecuritySettings", Name: validation.Null, Rule: true,
 													Chain: []validation.Constraint{{Target: "agreement.IntegrationAccountAgreementProperties.Content.AS2.SendAgreement.ProtocolSettings.SecuritySettings.OverrideGroupSigningCertificate", Name: validation.Null, Rule: true, Chain: nil},
diff --git a/services/preview/logic/mgmt/2018-07-01-preview/logic/models.go b/services/preview/logic/mgmt/2018-07-01-preview/logic/models.go
index 2ff199c0d4d1..dd27c0340e8a 100644
--- a/services/preview/logic/mgmt/2018-07-01-preview/logic/models.go
+++ b/services/preview/logic/mgmt/2018-07-01-preview/logic/models.go
@@ -851,12 +851,12 @@ type AS2MdnSettings struct {
 	ReceiptDeliveryURL *string `json:"receiptDeliveryUrl,omitempty"`
 	// DispositionNotificationTo - The disposition notification to header value.
 	DispositionNotificationTo *string `json:"dispositionNotificationTo,omitempty"`
-	// SignOutboundMDNIfOptional - The value indicating whether to sign the outbound MDN if optional.
-	SignOutboundMDNIfOptional *bool `json:"signOutboundMDNIfOptional,omitempty"`
+	// SignOutboundMdnIfOptional - The value indicating whether to sign the outbound MDN if optional.
+	SignOutboundMdnIfOptional *bool `json:"signOutboundMdnIfOptional,omitempty"`
 	// MdnText - The MDN text.
 	MdnText *string `json:"mdnText,omitempty"`
-	// SendInboundMDNToMessageBox - The value indicating whether to send inbound MDN to message box.
-	SendInboundMDNToMessageBox *bool `json:"sendInboundMDNToMessageBox,omitempty"`
+	// SendInboundMdnToMessageBox - The value indicating whether to send inbound MDN to message box.
+	SendInboundMdnToMessageBox *bool `json:"sendInboundMdnToMessageBox,omitempty"`
 	// MicHashingAlgorithm - The signing or hashing algorithm. Possible values include: 'HashingAlgorithmNotSpecified', 'HashingAlgorithmNone', 'HashingAlgorithmMD5', 'HashingAlgorithmSHA1', 'HashingAlgorithmSHA2256', 'HashingAlgorithmSHA2384', 'HashingAlgorithmSHA2512'
 	MicHashingAlgorithm HashingAlgorithm `json:"micHashingAlgorithm,omitempty"`
 }