diff --git a/common/changes/office-ui-fabric-react/unknownPersonaCoin_2018-05-08-13-17.json b/common/changes/office-ui-fabric-react/unknownPersonaCoin_2018-05-08-13-17.json
new file mode 100644
index 00000000000000..3561fe5ee38761
--- /dev/null
+++ b/common/changes/office-ui-fabric-react/unknownPersonaCoin_2018-05-08-13-17.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "office-ui-fabric-react",
+      "comment": "Added support for special casing UnknownPersona coin",
+      "type": "minor"
+    }
+  ],
+  "packageName": "office-ui-fabric-react",
+  "email": "ivdijan@microsoft.com"
+}
\ No newline at end of file
diff --git a/packages/office-ui-fabric-react/src/components/Persona/Persona.base.tsx b/packages/office-ui-fabric-react/src/components/Persona/Persona.base.tsx
index 2f7b99c2ea72b5..9ca0e9d00ece3e 100644
--- a/packages/office-ui-fabric-react/src/components/Persona/Persona.base.tsx
+++ b/packages/office-ui-fabric-react/src/components/Persona/Persona.base.tsx
@@ -52,6 +52,7 @@ export class PersonaBase extends BaseComponent<IPersonaProps, {}> {
       allowPhoneInitials,
       className,
       coinProps,
+      showUnknownPersonaCoin,
       coinSize,
       getStyles,
       imageAlt,
@@ -72,6 +73,7 @@ export class PersonaBase extends BaseComponent<IPersonaProps, {}> {
     const personaCoinProps: IPersonaSharedProps = {
       allowPhoneInitials,
       coinProps,
+      showUnknownPersonaCoin,
       coinSize,
       imageAlt,
       imageInitials,
diff --git a/packages/office-ui-fabric-react/src/components/Persona/Persona.test.tsx b/packages/office-ui-fabric-react/src/components/Persona/Persona.test.tsx
index b5183d0dece411..7381b24f81cb49 100644
--- a/packages/office-ui-fabric-react/src/components/Persona/Persona.test.tsx
+++ b/packages/office-ui-fabric-react/src/components/Persona/Persona.test.tsx
@@ -32,6 +32,12 @@ describe('Persona', () => {
     expect(tree).toMatchSnapshot();
   });
 
+  it('renders Persona correctly with UnknownPersona coin', () => {
+    const component = renderer.create(<Persona primaryText='Kat Larrson' showUnknownPersonaCoin={true} />);
+    const tree = component.toJSON();
+    expect(tree).toMatchSnapshot();
+  });
+
   describe('initials and colors', () => {
     it('calculates an expected initials in LTR if one was not specified', () => {
       let wrapper = mount(<Persona primaryText='Kat Larrson' />);
diff --git a/packages/office-ui-fabric-react/src/components/Persona/Persona.types.ts b/packages/office-ui-fabric-react/src/components/Persona/Persona.types.ts
index 6d6de2f2bc90dd..1e552ce8fca2cc 100644
--- a/packages/office-ui-fabric-react/src/components/Persona/Persona.types.ts
+++ b/packages/office-ui-fabric-react/src/components/Persona/Persona.types.ts
@@ -108,6 +108,12 @@ export interface IPersonaSharedProps extends React.HTMLAttributes<PersonaBase> {
    */
   showSecondaryText?: boolean;
 
+  /**
+   * If true, show the special coin for unknown persona.
+   * It has '?' in place of initials, with static font and background colors
+   */
+  showUnknownPersonaCoin?: boolean;
+
   /**
    * Optional custom persona coin size in pixel.
    */
@@ -240,6 +246,11 @@ export interface IPersonaCoinStyleProps {
    * @defaultvalue PersonaSize.size48
    */
   size?: PersonaSize;
+
+  /**
+   * Decides whether to display coin for unknown persona
+   */
+  showUnknownPersonaCoin?: boolean;
 }
 
 export interface IPersonaCoinStyles {
diff --git a/packages/office-ui-fabric-react/src/components/Persona/PersonaCoin/PersonaCoin.base.tsx b/packages/office-ui-fabric-react/src/components/Persona/PersonaCoin/PersonaCoin.base.tsx
index c411c653ec4735..624c85c745a0cd 100644
--- a/packages/office-ui-fabric-react/src/components/Persona/PersonaCoin/PersonaCoin.base.tsx
+++ b/packages/office-ui-fabric-react/src/components/Persona/PersonaCoin/PersonaCoin.base.tsx
@@ -80,6 +80,7 @@ export class PersonaCoinBase extends BaseComponent<IPersonaCoinProps, IPersonaSt
     const {
       className,
       coinProps,
+      showUnknownPersonaCoin,
       coinSize,
       getStyles,
       imageUrl,
@@ -105,6 +106,7 @@ export class PersonaCoinBase extends BaseComponent<IPersonaCoinProps, IPersonaSt
       theme: theme!,
       className: (coinProps && coinProps.className) ? coinProps.className : className,
       size,
+      showUnknownPersonaCoin,
     });
 
     return (
@@ -128,9 +130,7 @@ export class PersonaCoinBase extends BaseComponent<IPersonaCoinProps, IPersonaSt
                     <div
                       className={ mergeStyles(
                         classNames.initials,
-                        {
-                          backgroundColor: initialsColorPropToColorCode(this.props)
-                        }
+                        !showUnknownPersonaCoin && { backgroundColor: initialsColorPropToColorCode(this.props) }
                       ) }
                       style={ coinSizeStyle }
                       aria-hidden='true'
@@ -166,13 +166,15 @@ export class PersonaCoinBase extends BaseComponent<IPersonaCoinProps, IPersonaSt
       imageShouldFadeIn,
       imageShouldStartVisible,
       theme,
+      showUnknownPersonaCoin,
     } = this.props;
 
     const size = this.props.size as PersonaSize;
 
     const classNames = getClassNames(getStyles, {
       theme: theme!,
-      size
+      size,
+      showUnknownPersonaCoin
     });
 
     return (
@@ -195,8 +197,13 @@ export class PersonaCoinBase extends BaseComponent<IPersonaCoinProps, IPersonaSt
     const {
       allowPhoneInitials,
       primaryText,
+      showUnknownPersonaCoin
     } = props;
 
+    if (showUnknownPersonaCoin) {
+      return <Icon iconName='Help' />;
+    }
+
     const isRTL = getRTL();
 
     imageInitials = imageInitials || getInitials(primaryText, isRTL, allowPhoneInitials);
diff --git a/packages/office-ui-fabric-react/src/components/Persona/PersonaCoin/PersonaCoin.styles.ts b/packages/office-ui-fabric-react/src/components/Persona/PersonaCoin/PersonaCoin.styles.ts
index 04751a96a5b557..5de30c9bbc2be4 100644
--- a/packages/office-ui-fabric-react/src/components/Persona/PersonaCoin/PersonaCoin.styles.ts
+++ b/packages/office-ui-fabric-react/src/components/Persona/PersonaCoin/PersonaCoin.styles.ts
@@ -44,6 +44,10 @@ export const getStyles = (
 
   const classNames = getGlobalClassNames(GlobalClassNames, theme);
 
+  // Static colors used when displaying 'unknown persona' coin
+  const unknownPersonaBackgroundColor = palette.neutralLight;
+  const unknownPersonaFontColor = palette.redDark;
+
   return ({
     coin: [
       classNames.coin,
@@ -181,7 +185,7 @@ export const getStyles = (
       classNames.initials,
       {
         borderRadius: '50%',
-        color: palette.white,
+        color: props.showUnknownPersonaCoin ? unknownPersonaFontColor : palette.white,
         fontSize: FontSizes.large,
         fontWeight: FontWeights.regular,
         lineHeight: '46px',
@@ -198,6 +202,10 @@ export const getStyles = (
         }
       },
 
+      props.showUnknownPersonaCoin && {
+        backgroundColor: unknownPersonaBackgroundColor
+      },
+
       (size.isSize16 || size.isSize24 || size.isSize28) && {
         fontSize: FontSizes.xSmall,
       },
diff --git a/packages/office-ui-fabric-react/src/components/Persona/PersonaPage.tsx b/packages/office-ui-fabric-react/src/components/Persona/PersonaPage.tsx
index 83eb6062817ac5..262ce7afef4f6a 100644
--- a/packages/office-ui-fabric-react/src/components/Persona/PersonaPage.tsx
+++ b/packages/office-ui-fabric-react/src/components/Persona/PersonaPage.tsx
@@ -11,6 +11,7 @@ import { PersonaBasicExample } from './examples/Persona.Basic.Example';
 import { PersonaAlternateExample } from './examples/Persona.Alternate.Example';
 import { PersonaCustomRenderExample } from './examples/Persona.CustomRender.Example';
 import { PersonaCustomCoinRenderExample } from './examples/Persona.CustomCoinRender.Example';
+import { UnknownPersonaExample } from './examples/Persona.UnknownPersona.Example';
 import { ComponentStatus } from '../../demo/ComponentStatus/ComponentStatus';
 import { PersonaStatus } from './Persona.checklist';
 
@@ -19,6 +20,7 @@ const PersonaBasicExampleCode = require('!raw-loader!office-ui-fabric-react/src/
 const PersonaAlternateExampleCode = require('!raw-loader!office-ui-fabric-react/src/components/Persona/examples/Persona.Alternate.Example.tsx') as string;
 const PersonaCustomRenderExampleCode = require('!raw-loader!office-ui-fabric-react/src/components/Persona/examples/Persona.CustomRender.Example.tsx') as string;
 const PersonaCustomCoinRenderExampleCode = require('!raw-loader!office-ui-fabric-react/src/components/Persona/examples/Persona.CustomCoinRender.Example.tsx') as string;
+const UnknownPersonaExampleCode = require('!raw-loader!office-ui-fabric-react/src/components/Persona/examples/Persona.UnknownPersona.Example.tsx') as string;
 
 export class PersonaPage extends React.Component<IComponentDemoPageProps, {}> {
   public render(): JSX.Element {
@@ -44,6 +46,9 @@ export class PersonaPage extends React.Component<IComponentDemoPageProps, {}> {
             <ExampleCard title='Rendering custom coin' code={ PersonaCustomCoinRenderExampleCode }>
               <PersonaCustomCoinRenderExample />
             </ExampleCard>
+            <ExampleCard title='Rendering unknown persona coin' code={ UnknownPersonaExampleCode }>
+              <UnknownPersonaExample />
+            </ExampleCard>
           </div>
         }
         allowNativeProps={ true }
diff --git a/packages/office-ui-fabric-react/src/components/Persona/__snapshots__/Persona.test.tsx.snap b/packages/office-ui-fabric-react/src/components/Persona/__snapshots__/Persona.test.tsx.snap
index 5d2506121ceb58..6897808a0fd46b 100644
--- a/packages/office-ui-fabric-react/src/components/Persona/__snapshots__/Persona.test.tsx.snap
+++ b/packages/office-ui-fabric-react/src/components/Persona/__snapshots__/Persona.test.tsx.snap
@@ -1,5 +1,229 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`Persona renders Persona correctly with UnknownPersona coin 1`] = `
+<div
+  className=
+      ms-Persona
+      ms-Persona--size48
+      {
+        align-items: center;
+        box-shadow: none;
+        box-sizing: border-box;
+        color: #333333;
+        display: flex;
+        font-size: 14px;
+        font-weight: 400;
+        height: 48px;
+        margin-bottom: 0px;
+        margin-left: 0px;
+        margin-right: 0px;
+        margin-top: 0px;
+        min-width: 48px;
+        padding-bottom: 0px;
+        padding-left: 0px;
+        padding-right: 0px;
+        padding-top: 0px;
+        position: relative;
+      }
+      & .contextualHost {
+        display: none;
+      }
+      &:hover $primaryText {
+        color: #212121;
+      }
+  size={13}
+  style={undefined}
+>
+  <div
+    className=
+        ms-Persona-coin
+        ms-Persona--size48
+
+    size={13}
+  >
+    <div
+      className=
+          ms-Persona-imageArea
+          {
+            flex: 0 0 auto;
+            height: 48px;
+            position: relative;
+            text-align: center;
+            width: 48px;
+          }
+      style={undefined}
+    >
+      <div
+        aria-hidden="true"
+        className=
+            ms-Persona-initials
+            {
+              background-color: #eaeaea;
+              border-radius: 50%;
+              color: #a80000;
+              font-size: 17px;
+              font-weight: 400;
+              height: 48px;
+              line-height: 46px;
+            }
+            @media screen and (-ms-high-contrast: active){& {
+              -ms-high-contrast-adjust: none;
+              background-color: Window !important;
+              border: 1px solid WindowText;
+              box-sizing: border-box;
+              color: WindowText;
+            }
+        style={undefined}
+      >
+        <i
+          aria-hidden={true}
+          className=
+
+              {
+                -moz-osx-font-smoothing: grayscale;
+                -webkit-font-smoothing: antialiased;
+                display: inline-block;
+                font-family: "FabricMDL2Icons-1";
+                font-style: normal;
+                font-weight: normal;
+                speak: none;
+              }
+          data-icon-name="Help"
+          role="presentation"
+        >
+          
+        </i>
+      </div>
+      <div
+        className=
+            ms-Image
+            ms-Persona-image
+            {
+              border-radius: 50%;
+              border: 0px;
+              height: 100%;
+              left: 0px;
+              margin-right: 10px;
+              overflow: hidden;
+              perspective: 1px;
+              position: absolute;
+              top: 0px;
+              width: 100%;
+            }
+        style={
+          Object {
+            "height": 48,
+            "width": 48,
+          }
+        }
+      >
+        <img
+          alt=""
+          className=
+              ms-Image-image
+              ms-Image-image--cover
+              ms-Image-image--portrait
+              is-notLoaded
+              is-fadeIn
+              {
+                display: block;
+                height: auto;
+                left: 50% /* @noflip */;
+                opacity: 0;
+                position: absolute;
+                top: 50%;
+                transform: translate(-50%,-50%);
+                width: 100%;
+              }
+          onError={[Function]}
+          onLoad={[Function]}
+          role={undefined}
+          src={undefined}
+        />
+      </div>
+    </div>
+  </div>
+  <div
+    className=
+        ms-Persona-details
+        {
+          display: flex;
+          flex-direction: column;
+          justify-content: space-around;
+          min-width: 0px;
+          padding-bottom: 0;
+          padding-left: 16px;
+          padding-right: 24px;
+          padding-top: 0;
+          text-align: left;
+          width: 100%;
+        }
+  >
+    <div
+      className=
+          ms-Persona-primaryText
+          {
+            color: #333333;
+            font-size: 17px;
+            font-weight: 400;
+            overflow: hidden;
+            text-overflow: ellipsis;
+            white-space: nowrap;
+          }
+    >
+      <div
+        aria-describedby={undefined}
+        className="ms-TooltipHost"
+        onBlurCapture={[Function]}
+        onFocusCapture={[Function]}
+        onMouseEnter={[Function]}
+        onMouseLeave={[Function]}
+      >
+        Kat Larrson
+      </div>
+    </div>
+    <div
+      className=
+          ms-Persona-secondaryText
+          {
+            color: #666666;
+            font-size: 12px;
+            font-weight: 400;
+            overflow: hidden;
+            text-overflow: ellipsis;
+            white-space: nowrap;
+          }
+    />
+    <div
+      className=
+          ms-Persona-tertiaryText
+          {
+            color: #666666;
+            display: none;
+            font-size: 12px;
+            font-weight: 400;
+            overflow: hidden;
+            text-overflow: ellipsis;
+            white-space: nowrap;
+          }
+    />
+    <div
+      className=
+          ms-Persona-optionalText
+          {
+            color: #666666;
+            display: none;
+            font-size: 12px;
+            font-weight: 400;
+            overflow: hidden;
+            text-overflow: ellipsis;
+            white-space: nowrap;
+          }
+    />
+  </div>
+</div>
+`;
+
 exports[`Persona renders Persona correctly with image 1`] = `
 <div
   className=
diff --git a/packages/office-ui-fabric-react/src/components/Persona/examples/Persona.UnknownPersona.Example.tsx b/packages/office-ui-fabric-react/src/components/Persona/examples/Persona.UnknownPersona.Example.tsx
new file mode 100644
index 00000000000000..2e58b619de6a13
--- /dev/null
+++ b/packages/office-ui-fabric-react/src/components/Persona/examples/Persona.UnknownPersona.Example.tsx
@@ -0,0 +1,29 @@
+import * as React from 'react';
+import {
+  Persona,
+  PersonaSize,
+} from 'office-ui-fabric-react/lib/Persona';
+import './PersonaExample.scss';
+
+export class UnknownPersonaExample extends React.Component<any, any> {
+  public render(): JSX.Element {
+    return (
+      <div className='ms-PersonaExample'>
+        <Persona
+          showUnknownPersonaCoin={true}
+          primaryText='Maor Sharett'
+          secondaryText='Designer'
+          size={PersonaSize.size40}
+        />
+
+        <Persona
+          showUnknownPersonaCoin={true}
+          primaryText='Kat Larrson'
+          secondaryText='Designer'
+          tertiaryText='Unverified sender'
+          size={PersonaSize.size72}
+        />
+      </div>
+    );
+  }
+}