diff --git a/apps/webapp/src/i18n/en-US.json b/apps/webapp/src/i18n/en-US.json
index a31fe29da77..f8336c1a566 100644
--- a/apps/webapp/src/i18n/en-US.json
+++ b/apps/webapp/src/i18n/en-US.json
@@ -57,6 +57,7 @@
   "E2EI.certificateDetails": "Certificate details (PEM format)",
   "E2EI.certificateExpired": "End-to-end identity certificate expired",
   "E2EI.certificateExpiresSoon": "End-to-end identity certificate expires soon",
+  "E2EI.certificateNotActivated": "End-to-end identity certificate not activated",
   "E2EI.certificateNotDownloaded": "End-to-end identity certificate not downloaded",
   "E2EI.certificateRevoked": "End-to-end identity certificate revoked",
   "E2EI.certificateTitle": "End-to-end identity certificate",
diff --git a/apps/webapp/src/script/components/badge/components/verificationBadges/verificationBadges.test.tsx b/apps/webapp/src/script/components/badge/components/verificationBadges/verificationBadges.test.tsx
index 197852839df..ac6d8e8aab0 100644
--- a/apps/webapp/src/script/components/badge/components/verificationBadges/verificationBadges.test.tsx
+++ b/apps/webapp/src/script/components/badge/components/verificationBadges/verificationBadges.test.tsx
@@ -18,6 +18,7 @@
  */
 
 import {render} from '@testing-library/react';
+import {Maybe} from 'true-myth';
 
 import {withTheme} from 'src/script/auth/util/test/testUtil';
 import {MLSStatuses} from 'src/script/e2eIdentity';
@@ -26,7 +27,7 @@ import {
   createRootProviderWrapperForTest,
 } from 'src/script/page/testSupport/rootContextTestSupport';
 
-import {VerificationBadges} from './verificationBadges';
+import {VerificationBadges, getUserVerificationBadgeLabel} from './verificationBadges';
 import {translateForTest} from 'Util/test/translateForTest';
 
 const rootContextValue = createRootContextValueForTest({translate: translateForTest});
@@ -92,3 +93,37 @@ describe('VerificationBadges', () => {
     expect(E2EIdentityStatus.getAttribute('data-uie-value')).toEqual(MLSStatuses.EXPIRES_SOON);
   });
 });
+
+describe('getUserVerificationBadgeLabel', () => {
+  it('returns MLS verified label for VALID status', () => {
+    const label = getUserVerificationBadgeLabel(translateForTest, {
+      mlsStatus: Maybe.just(MLSStatuses.VALID),
+      isProteusVerified: false,
+    });
+    expect(label).toBe(translateForTest('E2EI.userDevicesVerified'));
+  });
+
+  it('returns Proteus device verified label when isProteusVerified is true', () => {
+    const label = getUserVerificationBadgeLabel(translateForTest, {
+      mlsStatus: Maybe.nothing(),
+      isProteusVerified: true,
+    });
+    expect(label).toBe(translateForTest('proteusDeviceVerified'));
+  });
+
+  it('returns composed labels when both MLS and Proteus are verified', () => {
+    const label = getUserVerificationBadgeLabel(translateForTest, {
+      mlsStatus: Maybe.just(MLSStatuses.VALID),
+      isProteusVerified: true,
+    });
+    expect(label).toBe(`${translateForTest('E2EI.userDevicesVerified')}, ${translateForTest('proteusDeviceVerified')}`);
+  });
+
+  it('returns undefined when neither MLS nor Proteus is verified', () => {
+    const label = getUserVerificationBadgeLabel(translateForTest, {
+      mlsStatus: Maybe.nothing(),
+      isProteusVerified: false,
+    });
+    expect(label).toBeUndefined();
+  });
+});
diff --git a/apps/webapp/src/script/components/badge/components/verificationBadges/verificationBadges.tsx b/apps/webapp/src/script/components/badge/components/verificationBadges/verificationBadges.tsx
index e9425d70438..12274bbe54c 100644
--- a/apps/webapp/src/script/components/badge/components/verificationBadges/verificationBadges.tsx
+++ b/apps/webapp/src/script/components/badge/components/verificationBadges/verificationBadges.tsx
@@ -23,6 +23,7 @@ import {CSSObject} from '@emotion/react';
 import {CONVERSATION_PROTOCOL} from '@wireapp/api-client/lib/team';
 import {stringifyQualifiedId} from '@wireapp/core/lib/util/qualifiedIdUtil';
 import {container} from 'tsyringe';
+import {Maybe} from 'true-myth';
 
 import {
   TabIndex,
@@ -98,7 +99,7 @@ const getMLSStatuses = ({identities, user}: {identities?: WireIdentity[]; user?:
   });
 };
 
-export const UserVerificationBadges = ({
+export const useUserVerificationStatus = ({
   user,
   groupId,
   isSelfUser,
@@ -115,12 +116,57 @@ export const UserVerificationBadges = ({
     user,
   });
 
-  let status: MLSStatuses | undefined = undefined;
-  if (mlsStatuses && mlsStatuses.length > 0 && mlsStatuses.every(status => status === MLSStatuses.VALID)) {
-    status = MLSStatuses.VALID;
+  const mlsStatus = Maybe.of<MLSStatuses.VALID>(
+    mlsStatuses && mlsStatuses.length > 0 && mlsStatuses.every(status => status === MLSStatuses.VALID)
+      ? MLSStatuses.VALID
+      : undefined,
+  );
+
+  return {mlsStatus, isProteusVerified};
+};
+
+export const getUserVerificationBadgeLabel = (
+  translate: RootContextValue['translate'],
+  {mlsStatus, isProteusVerified}: {mlsStatus: Maybe<MLSStatuses.VALID>; isProteusVerified: boolean},
+): string | undefined => {
+  const labels: string[] = [];
+
+  mlsStatus.map(() => labels.push(translate('E2EI.userDevicesVerified')));
+
+  if (isProteusVerified) {
+    labels.push(translate('proteusDeviceVerified'));
   }
 
-  return <VerificationBadges context="user" isProteusVerified={isProteusVerified} MLSStatus={status} />;
+  return labels.length > 0 ? labels.join(', ') : undefined;
+};
+
+export const UserVerificationBadgesContent = ({
+  mlsStatus,
+  isProteusVerified,
+}: {
+  mlsStatus: Maybe<MLSStatuses.VALID>;
+  isProteusVerified: boolean;
+}) => {
+  return (
+    <VerificationBadges
+      context="user"
+      isProteusVerified={isProteusVerified}
+      MLSStatus={mlsStatus.unwrapOr(undefined)}
+    />
+  );
+};
+
+export const UserVerificationBadges = ({
+  user,
+  groupId,
+  isSelfUser,
+}: {
+  user: User;
+  groupId?: string;
+  isSelfUser?: boolean;
+}) => {
+  const {mlsStatus, isProteusVerified} = useUserVerificationStatus({user, groupId, isSelfUser});
+  return <UserVerificationBadgesContent mlsStatus={mlsStatus} isProteusVerified={isProteusVerified} />;
 };
 
 export const DeviceVerificationBadges = ({
diff --git a/apps/webapp/src/script/page/leftSidebar/userDetails/userDetails.tsx b/apps/webapp/src/script/page/leftSidebar/userDetails/userDetails.tsx
index e490fe5262a..1b1be37e6bc 100644
--- a/apps/webapp/src/script/page/leftSidebar/userDetails/userDetails.tsx
+++ b/apps/webapp/src/script/page/leftSidebar/userDetails/userDetails.tsx
@@ -19,12 +19,18 @@
 
 import {memo} from 'react';
 
+import is from '@sindresorhus/is';
 import cx from 'classnames';
+import {Availability} from '@wireapp/protocol-messaging';
 
 import {TabIndex} from '@wireapp/react-ui-kit';
 
 import {Avatar, AVATAR_SIZE} from 'Components/avatar';
-import {UserVerificationBadges} from 'Components/badge';
+import {
+  getUserVerificationBadgeLabel,
+  useUserVerificationStatus,
+  UserVerificationBadgesContent,
+} from 'Components/badge';
 import {LegalHoldDot} from 'Components/LegalHoldDot';
 import {User} from 'Repositories/entity/User';
 import {useApplicationContext} from 'src/script/page/rootProvider';
@@ -37,18 +43,38 @@ import {AvailabilityContextMenu} from '../../../ui/availabilityContextMenu';
 interface AvailabilityStateButtonWrapperProps {
   children: React.ReactElement;
   isTeam: boolean;
+  ariaLabel: string;
   showAvailabilityContextMenu: (event: MouseEvent) => void;
 }
 
+const isAvailabilityType = (value: unknown): value is Availability.Type =>
+  Object.values(Availability.Type).some(availabilityType => availabilityType === value);
+
+const getAvailabilityTranslationKey = (availability: Availability.Type) => {
+  switch (availability) {
+    case Availability.Type.AVAILABLE:
+      return 'availability.available';
+    case Availability.Type.BUSY:
+      return 'availability.busy';
+    case Availability.Type.AWAY:
+      return 'availability.away';
+    case Availability.Type.NONE:
+      return 'availability.none';
+  }
+};
+
 const AvailabilityStateButtonWrapper = ({
   children,
   isTeam = false,
+  ariaLabel,
   showAvailabilityContextMenu,
 }: AvailabilityStateButtonWrapperProps) => {
   return isTeam ? (
     <button
       onClick={event => showAvailabilityContextMenu(event.nativeEvent)}
       className="button-reset-default user-details-avatar"
+      aria-label={ariaLabel}
+      aria-haspopup="menu"
     >
       {children}
     </button>
@@ -69,9 +95,11 @@ const UserDetailsComponent = ({user, isTeam = false, groupId, isSideBarOpen = fa
   const {
     name: userName,
     username: userHandle,
+    availability,
     isOnLegalHold,
     hasPendingLegalHold,
-  } = useKoSubscribableChildren(user, ['hasPendingLegalHold', 'isOnLegalHold', 'name', 'username']);
+  } = useKoSubscribableChildren(user, ['availability', 'hasPendingLegalHold', 'isOnLegalHold', 'name', 'username']);
+  const verificationStatus = useUserVerificationStatus({user, groupId, isSelfUser: isTeam});
 
   const showLegalHold = isOnLegalHold || hasPendingLegalHold;
 
@@ -84,14 +112,27 @@ const UserDetailsComponent = ({user, isTeam = false, groupId, isSideBarOpen = fa
     });
   };
 
+  const avatarAriaLabel = [
+    userName,
+    userHandle,
+    isTeam && isAvailabilityType(availability) ? translate(getAvailabilityTranslationKey(availability)) : undefined,
+    getUserVerificationBadgeLabel(translate, verificationStatus),
+  ]
+    .filter((label): label is string => is.nonEmptyString(label))
+    .join(', ');
+
   return (
     <div css={styles.wrapper(isSideBarOpen)}>
-      <AvailabilityStateButtonWrapper isTeam={isTeam} showAvailabilityContextMenu={showAvailabilityContextMenu}>
+      <AvailabilityStateButtonWrapper
+        isTeam={isTeam}
+        ariaLabel={avatarAriaLabel}
+        showAvailabilityContextMenu={showAvailabilityContextMenu}
+      >
         <Avatar
           className={cx('see-through', {'user-details-avatar': !isTeam})}
           participant={user}
           avatarSize={AVATAR_SIZE.MEDIUM}
-          avatarAlt={translate('selfProfileImageAlt')}
+          avatarAlt={isTeam ? '' : translate('selfProfileImageAlt')}
         />
       </AvailabilityStateButtonWrapper>
 
@@ -99,13 +140,17 @@ const UserDetailsComponent = ({user, isTeam = false, groupId, isSideBarOpen = fa
         {isTeam ? (
           <>
             <div css={styles.userDetails} data-uie-name="status-availability">
-              <button css={styles.userFullName} onClick={event => showAvailabilityContextMenu(event.nativeEvent)}>
+              <button
+                css={styles.userFullName}
+                onClick={event => showAvailabilityContextMenu(event.nativeEvent)}
+                aria-haspopup="menu"
+              >
                 <span data-uie-name="status-label" css={{...styles.userName, ...styles.textEllipsis}} title={userName}>
                   {userName}
                 </span>
               </button>
 
-              <UserVerificationBadges user={user} isSelfUser groupId={groupId} />
+              <UserVerificationBadgesContent {...verificationStatus} />
             </div>
 
             {showLegalHold && (