diff --git a/protos/SignalService.proto b/protos/SignalService.proto
index 73894ada6c6..cf4f19bd356 100644
--- a/protos/SignalService.proto
+++ b/protos/SignalService.proto
@@ -602,6 +602,7 @@ message SyncMessage {
       ACCEPTED     = 1;
       NOT_ACCEPTED = 2;
       DELETE       = 3;
+      OBSERVED     = 4;
     }
 
     /* Data identifying a conversation. The service ID for 1:1, the group ID for
diff --git a/ts/services/calling.ts b/ts/services/calling.ts
index 0a3014f6930..a3c0ed85e82 100644
--- a/ts/services/calling.ts
+++ b/ts/services/calling.ts
@@ -3189,22 +3189,25 @@ export class CallingClass {
     const callId = getCallIdFromEra(peekInfo.eraId);
 
     try {
-      // We only log events confirmed joined. If admin approval is required, then
-      // the call begins in the Pending state and we don't want history for that.
-      if (joinState !== GroupCallJoinState.Joined) {
+      let localCallEvent;
+      if (joinState === GroupCallJoinState.Joined) {
+        localCallEvent = LocalCallEvent.Accepted;
+      } else if (peekInfo && peekInfo.devices.length > 0) {
+        localCallEvent = LocalCallEvent.Started;
+      } else {
         return;
       }
 
       const callDetails = getCallDetailsForAdhocCall(roomId, callId);
       const callEvent = getCallEventDetails(
         callDetails,
-        LocalCallEvent.Accepted,
-        'CallingClass.updateCallHistoryForGroupCallOnLocalChanged'
+        localCallEvent,
+        'CallingClass.updateCallHistoryForAdhocCall'
       );
       await updateAdhocCallHistory(callEvent);
     } catch (error) {
       log.error(
-        'CallingClass.updateCallHistoryForGroupCallOnLocalChanged: Error updating state',
+        'CallingClass.updateCallHistoryForAdhocCall: Error updating state',
         Errors.toLogFormat(error)
       );
     }
diff --git a/ts/state/ducks/calling.ts b/ts/state/ducks/calling.ts
index 97d4b4f2817..a6255d5cc4f 100644
--- a/ts/state/ducks/calling.ts
+++ b/ts/state/ducks/calling.ts
@@ -536,11 +536,10 @@ const doGroupCallPeek = ({
 
     log.info(`doGroupCallPeek/${logId}: Found ${peekInfo.deviceCount} devices`);
 
+    const joinState = isGroupOrAdhocCallState(existingCall)
+      ? existingCall.joinState
+      : null;
     if (callMode === CallMode.Group) {
-      const joinState = isGroupOrAdhocCallState(existingCall)
-        ? existingCall.joinState
-        : null;
-
       try {
         await calling.updateCallHistoryForGroupCallOnPeek(
           conversationId,
@@ -555,6 +554,12 @@ const doGroupCallPeek = ({
       }
 
       dispatch(updateLastMessage(conversationId));
+    } else if (callMode === CallMode.Adhoc) {
+      await calling.updateCallHistoryForAdhocCall(
+        conversationId,
+        joinState,
+        peekInfo
+      );
     }
 
     const formattedPeekInfo = calling.formatGroupCallPeekInfoForRedux(peekInfo);
diff --git a/ts/types/CallDisposition.ts b/ts/types/CallDisposition.ts
index a4f96b9ff9f..9ec61943d57 100644
--- a/ts/types/CallDisposition.ts
+++ b/ts/types/CallDisposition.ts
@@ -44,6 +44,7 @@ export enum RemoteCallEvent {
   Accepted = 'Accepted',
   NotAccepted = 'NotAccepted',
   Delete = 'Delete',
+  Observed = 'Observed',
 }
 
 export type CallEvent = LocalCallEvent | RemoteCallEvent;
@@ -55,6 +56,7 @@ export enum CallStatusValue {
   Declined = 'Declined',
   Deleted = 'Deleted',
   GenericGroupCall = 'GenericGroupCall',
+  GenericAdhocCall = 'GenericAdhocCall',
   OutgoingRing = 'OutgoingRing',
   Ringing = 'Ringing',
   Joined = 'Joined',
@@ -81,6 +83,7 @@ export enum GroupCallStatus {
 }
 
 export enum AdhocCallStatus {
+  Generic = CallStatusValue.GenericAdhocCall,
   Pending = CallStatusValue.Pending,
   Joined = CallStatusValue.JoinedAdhoc,
   Deleted = CallStatusValue.Deleted,
diff --git a/ts/util/callDisposition.ts b/ts/util/callDisposition.ts
index ed043d6a16b..1595a11f81a 100644
--- a/ts/util/callDisposition.ts
+++ b/ts/util/callDisposition.ts
@@ -67,6 +67,7 @@ import {
 import type { ConversationType } from '../state/ducks/conversations';
 import type { ConversationModel } from '../models/conversations';
 import { drop } from './drop';
+import { sendCallLinkUpdateSync } from './sendCallLinkUpdateSync';
 
 // utils
 // -----
@@ -234,6 +235,8 @@ export function getCallEventForProto(
     event = RemoteCallEvent.NotAccepted;
   } else if (callEvent.event === Proto.SyncMessage.CallEvent.Event.DELETE) {
     event = RemoteCallEvent.Delete;
+  } else if (callEvent.event === Proto.SyncMessage.CallEvent.Event.OBSERVED) {
+    event = RemoteCallEvent.Observed;
   } else {
     throw new TypeError(`Unknown call event ${callEvent.event}`);
   }
@@ -301,6 +304,8 @@ const statusToProto: Record<
   [CallStatusValue.Missed]: null,
   [CallStatusValue.Pending]: null,
   [CallStatusValue.GenericGroupCall]: null,
+  [CallStatusValue.GenericAdhocCall]:
+    Proto.SyncMessage.CallEvent.Event.OBSERVED,
   [CallStatusValue.OutgoingRing]: null,
   [CallStatusValue.Ringing]: null,
   [CallStatusValue.Joined]: null,
@@ -650,6 +655,15 @@ function transitionTimestamp(
     return callHistory.timestamp;
   }
 
+  // Observed call history should only be changed if we get a remote observed
+  // event with possibly a better timestamp.
+  if (callHistory.status === AdhocCallStatus.Generic) {
+    if (callEvent.event === RemoteCallEvent.Observed) {
+      return latestTimestamp;
+    }
+    return callHistory.timestamp;
+  }
+
   // Declined call history should only be changed if if we transition to an
   // accepted state or get a remote 'not accepted' event with possibly a better
   // timestamp.
@@ -713,6 +727,12 @@ function transitionDirectCallStatus(
     return DirectCallStatus.Missed;
   }
 
+  if (callEvent === RemoteCallEvent.Observed) {
+    throw new Error(
+      `callHistoryDetails: Direct calls shouldn't send ${callEvent}`
+    );
+  }
+
   if (callEvent === LocalCallEvent.Missed) {
     return DirectCallStatus.Missed;
   }
@@ -766,7 +786,10 @@ function transitionGroupCallStatus(
     return status;
   }
 
-  if (event === RemoteCallEvent.NotAccepted) {
+  if (
+    event === RemoteCallEvent.NotAccepted ||
+    event === RemoteCallEvent.Observed
+  ) {
     throw new Error(`callHistoryDetails: Group calls shouldn't send ${event}`);
   }
 
@@ -859,6 +882,13 @@ function transitionAdhocCallStatus(
     return status;
   }
 
+  if (
+    callEvent === RemoteCallEvent.Observed ||
+    callEvent === LocalCallEvent.Started
+  ) {
+    return AdhocCallStatus.Generic;
+  }
+
   // For Adhoc calls, ringing and corresponding events are not supported currently.
   // However we handle those events here to be exhaustive.
   if (
@@ -867,7 +897,6 @@ function transitionAdhocCallStatus(
     callEvent === LocalCallEvent.Declined ||
     callEvent === LocalCallEvent.Hangup ||
     callEvent === LocalCallEvent.RemoteHangup ||
-    callEvent === LocalCallEvent.Started ||
     // never actually happens, but need for exhaustive check
     callEvent === LocalCallEvent.Ringing
   ) {
@@ -985,7 +1014,8 @@ export async function updateLocalAdhocCallHistory(
   }
 
   strictAssert(
-    callHistory.status === AdhocCallStatus.Pending ||
+    callHistory.status === AdhocCallStatus.Generic ||
+      callHistory.status === AdhocCallStatus.Pending ||
       callHistory.status === AdhocCallStatus.Joined ||
       callHistory.status === AdhocCallStatus.Deleted,
     `updateAdhocCallHistory: callHistory must have adhoc status (was ${callHistory.status})`
@@ -1002,6 +1032,28 @@ export async function updateLocalAdhocCallHistory(
       formatCallHistory(callHistory)
     );
     await window.Signal.Data.saveCallHistory(callHistory);
+
+    /*
+      If we're not a call link admin and this is the first call history for this link,
+      then it means we clicked someone else's link and discovered it was active. We
+      sync this newly observed call link so the subsequent call event OBSERVED sync
+      message refers to a valid call link.
+    */
+    if (prevCallHistory == null) {
+      const callLink = await window.Signal.Data.getCallLinkByRoomId(
+        callEvent.peerId
+      );
+      if (callLink) {
+        log.info(
+          `updateAdhocCallHistory: Syncing new observed call link ${callEvent.peerId}`
+        );
+        drop(sendCallLinkUpdateSync(callLink));
+      } else {
+        log.error(
+          `updateAdhocCallHistory: New observed call link missing in DB: ${callEvent.peerId}`
+        );
+      }
+    }
   }
 
   if (isDeleted) {