diff --git a/types/office-js-preview/index.d.ts b/types/office-js-preview/index.d.ts
index b73b7de69a..116112bee1 100644
--- a/types/office-js-preview/index.d.ts
+++ b/types/office-js-preview/index.d.ts
@@ -6586,7 +6586,7 @@ declare namespace Office {
         /**
          * The start date for the baseline task.
          */
-        Basline3Start,
+        Baseline3Start,
         /**
          * The total person-hours scheduled for the baseline task, in minutes.
          */
@@ -9714,7 +9714,7 @@ declare namespace Office {
          *
          * Note: This member is not supported in Outlook for iOS or Outlook for Android.
          */
-        dateTimeModifed: Date;
+        dateTimeModified: Date;
         /**
          * Gets or sets the date and time that the appointment is to end.
          *
@@ -10801,7 +10801,7 @@ declare namespace Office {
          *
          * Note: This member is not supported in Outlook for iOS or Outlook for Android.
          */
-        dateTimeModifed: Date;
+        dateTimeModified: Date;
         /**
          * Gets the date and time that the appointment is to end.
          *
@@ -11525,7 +11525,7 @@ declare namespace Office {
          *
          * Note: This member is not supported in Outlook for iOS or Outlook for Android.
          */
-        dateTimeModifed: Date;
+        dateTimeModified: Date;
         /**
          * Gets the type of item that an instance represents.
          *
@@ -12329,7 +12329,7 @@ declare namespace Office {
          *
          * @param attachmentId The identifier of the attachment to remove.
          * @param callback Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of 
-         *                 type {@link Offfice.AsyncResult}. 
+         *                 type {@link Office.AsyncResult}. 
          *                 If removing the attachment fails, the asyncResult.error property will contain an error code with the reason for the failure.
          */
         removeAttachmentAsync(attachmentId: string, callback: (result: AsyncResult<void>) => void): void;
@@ -13137,7 +13137,7 @@ declare namespace Office {
          *
          * Note: This member is not supported in Outlook for iOS or Outlook for Android.
          */
-        dateTimeModifed: Date;
+        dateTimeModified: Date;
         /**
          * Gets the email address of the sender of a message.
          *
@@ -14230,7 +14230,7 @@ declare namespace Office {
          *
          * Note: This member is not supported in Outlook for iOS or Outlook for Android.
          */
-        dateTimeModifed: Date;
+        dateTimeModified: Date;
         /**
          * Gets the email address of the sender of a message.
          *
@@ -14926,7 +14926,7 @@ declare namespace Office {
          */
         date: number;
         /**
-         * Integer value repesenting the year.
+         * Integer value representing the year.
          */
         year: number;
         /**
diff --git a/types/office-js/index.d.ts b/types/office-js/index.d.ts
index 8c918cc8e2..3046c98234 100644
--- a/types/office-js/index.d.ts
+++ b/types/office-js/index.d.ts
@@ -6586,7 +6586,7 @@ declare namespace Office {
         /**
          * The start date for the baseline task.
          */
-        Basline3Start,
+        Baseline3Start,
         /**
          * The total person-hours scheduled for the baseline task, in minutes.
          */
@@ -9714,7 +9714,7 @@ declare namespace Office {
          *
          * Note: This member is not supported in Outlook for iOS or Outlook for Android.
          */
-        dateTimeModifed: Date;
+        dateTimeModified: Date;
         /**
          * Gets or sets the date and time that the appointment is to end.
          *
@@ -10801,7 +10801,7 @@ declare namespace Office {
          *
          * Note: This member is not supported in Outlook for iOS or Outlook for Android.
          */
-        dateTimeModifed: Date;
+        dateTimeModified: Date;
         /**
          * Gets the date and time that the appointment is to end.
          *
@@ -11525,7 +11525,7 @@ declare namespace Office {
          *
          * Note: This member is not supported in Outlook for iOS or Outlook for Android.
          */
-        dateTimeModifed: Date;
+        dateTimeModified: Date;
         /**
          * Gets the type of item that an instance represents.
          *
@@ -12329,7 +12329,7 @@ declare namespace Office {
          *
          * @param attachmentId The identifier of the attachment to remove.
          * @param callback Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of 
-         *                 type {@link Offfice.AsyncResult}. 
+         *                 type {@link Office.AsyncResult}. 
          *                 If removing the attachment fails, the asyncResult.error property will contain an error code with the reason for the failure.
          */
         removeAttachmentAsync(attachmentId: string, callback: (result: AsyncResult<void>) => void): void;
@@ -13137,7 +13137,7 @@ declare namespace Office {
          *
          * Note: This member is not supported in Outlook for iOS or Outlook for Android.
          */
-        dateTimeModifed: Date;
+        dateTimeModified: Date;
         /**
          * Gets the email address of the sender of a message.
          *
@@ -14230,7 +14230,7 @@ declare namespace Office {
          *
          * Note: This member is not supported in Outlook for iOS or Outlook for Android.
          */
-        dateTimeModifed: Date;
+        dateTimeModified: Date;
         /**
          * Gets the email address of the sender of a message.
          *
@@ -14926,7 +14926,7 @@ declare namespace Office {
          */
         date: number;
         /**
-         * Integer value repesenting the year.
+         * Integer value representing the year.
          */
         year: number;
         /**